List of Alpha Omicron Pi chapters

Alpha Omicron Pi is an international collegiate women's fraternity.^[1] It was established at Barnard College of Columbia University in 1897.^[1]

Collegiate chapters

In the following list, active chapters are indicated in bold and inactive chapters and institutions are indicated in italics.^[1][2][3][4]

No.	Chapter	Charter date and range	Institution	Location	Status	Ref.
1	Alpha	January 2, 1897 – 1916; 2013	Columbia University	New York City, New York	Active
2	Pi	September 8, 1898 – 1976; 1986–1995; 2000–2004	Tulane University	New Orleans, Louisiana	Inactive
3	Nu	December 26, 1900 – 1961	New York University	New York City, New York	Inactive	[a]
4	Omicron	April 14, 1902	University of Tennessee	Knoxville, Tennessee	Active
5	Kappa	April 13, 1903 – 1960	Randolph-Macon Women's College	Lynchburg, Virginia	Inactive
6	Zeta	June 5, 1903	University of Nebraska–Lincoln	Lincoln, Nebraska	Active	[b]
7	Sigma	February 6, 1907 – 2016	University of California, Berkeley	Berkeley, California	Inactive	[c]
8	Theta	August 23, 1907 – 1979; 1985–2000	DePauw University	Greencastle, Indiana	Inactive	[d]
9	Beta	April 13, 1908 – 1908	Brown University	Providence, Rhode Island	Inactive	[e]
10	Delta	April 13, 1908 – 1969; 1987 – December 11, 2017	Tufts University	Somerville, Massachusetts	Inactive	[5][f][g]
11	Gamma	April 16, 1908	University of Maine	Orono, Maine	Active	[h]
12	Epsilon	April 23, 1908 – 1962; 1989–2008	Cornell University	Ithaca, New York	Inactive
13	Rho	June 11, 1909 – 1973	Northwestern University	Evanston, Illinois	Inactive
14	Lambda	November 5, 1910 – 1944	Stanford University	Stanford, California	Inactive	[6][i]
15	Iota	February 27, 1911	University of Illinois Urbana-Champaign	Urbana, Illinois	Active	[7][j]
16	Tau	October 29, 1912	University of Minnesota	Minneapolis, Minnesota	Active	[k]
17	Chi	December 19, 1914 – 1958; 1985–2000	Syracuse University	Syracuse, New York	Inactive	[l]
18	Upsilon	September 18, 1915 – 1995; 2013–2020	University of Washington	Seattle, Washington	Inactive	[m]
19	Nu Kappa	September 25, 1915 – 1942	Southern Methodist University	Dallas, Texas	Inactive
20	Beta Phi	June 3, 1916 – 1996; 2000	Indiana University Bloomington	Bloomington, Indiana	Active	[8]
21	Eta	January 29, 1917 – 1942	University of Wisconsin–Madison	Madison, Wisconsin	Inactive
22	Alpha Phi	February 23, 1917	Montana State University	Bozeman, Montana	Active	[n]
23	Nu Omicron	April 28, 1917 – 2021	Vanderbilt University	Nashville, Tennessee	Inactive	[9][o]
24	Psi	April 13, 1918 – 1958	University of Pennsylvania	Philadelphia, Pennsylvania	Inactive	[p]
25	Phi	May 4, 1918 – 1969; 1980–1996	University of Kansas	Lawrence, Kansas	Inactive	[q]
26	Omega	January 4, 1919	Miami University	Oxford, Ohio	Active	[r]
27	Omicron Pi	October 8, 1921 – 1974; 1978–1993; 2017–2020	University of Michigan	Ann Arbor, Michigan	Inactive	[s]
28	Alpha Sigma	May 5, 1923 – 1989	University of Oregon	Eugene, Oregon	Inactive	[t]
29	Xi	March 22, 1924 – 1933; 2002	University of Oklahoma	Norman, Oklahoma	Active	[u]
30	Pi Delta	October 25, 1924	University of Maryland, College Park	College Park, Maryland	Active	[v]
31	Tau Delta	May 23, 1925 – May 31, 2024	Birmingham–Southern College	Birmingham, Alabama	Inactive	[w]
32	Kappa Theta	May 23, 1925 – 1973	University of California, Los Angeles	Los Angeles, California	Inactive	[x]
33	Kappa Omicron	November 20, 1925	Rhodes College	Memphis, Tennessee	Active	[y]
34	Alpha Rho	June 5, 1926 – 1935; 1946–1992; 2013	Oregon State University	Corvallis, Oregon	Active	[z]
35	Chi Delta	May 14, 1927 – 2009	University of Colorado Boulder	Boulder, Colorado	Inactive	[aa]
36	Beta Theta	October 1, 1927 – 1940	Butler University	Indianapolis, Indiana	Inactive
37	Alpha Pi	May 6, 1928 – 1939; 1949–1973; 1976–1980; 2013	Florida State University	Tallahassee, Florida	Active	[ab]
38	Epsilon Alpha	April 6, 1929 – 1973; 1982	Pennsylvania State University	Tallahassee, Florida	Active	[ac]
39	Theta Eta	July 30, 1929 – 1950	University of Cincinnati	Cincinnati, Ohio	Inactive	[ad]
40	Beta Tau	September 27, 1930	University of Toronto	Toronto, Ontario, Canada	Active	[ae]
41	Alpha Tau	December 13, 1930 – 1970	Denison University	Granville, Ohio	Inactive	[af]
42	Beta Kappa	October 17, 1931 – 1985; 2011	University of British Columbia	Vancouver, British Columbia, Canada	Active	[ag]
43	Alpha Gamma	May 21, 1932 – 1937; 1961	Washington State University	Pullman, Washington	Active	[ah]
44	Delta Phi	September 23, 1933 – 1937; 1978–1983	University of South Carolina	Columbia, South Carolina	Inactive	[ai]
45	Beta Gamma	September 22, 1934 – 1969; 1989	Michigan State University	East Lansing, Michigan	Active	[aj]
46	Lambda Sigma	April 27, 1935	University of Georgia	Athens, Georgia	Active
47	Sigma Tau	May 14, 1938	Washington College	Chestertown, Maryland	Active	[ak]
48	Alpha Omicron	November 5, 1938 – 1980	Louisiana State University	Baton Rouge, Louisiana	Inactive	[al]
49	Kappa Phi	March 25, 1939 – 1973; 1989	McGill University	Montreal, Québec, Canada	Active	[am]
50	Pi Kappa	April 19, 1941 – 1973	University of Texas at Austin	Austin, Texas	Inactive
51	Theta Psi	November 11, 1944	University of Toledo	Toledo, Ohio	Active	[an]
52	Nu Lambda	June 26, 1945 – 1962; 1976–1990	University of Southern California	Los Angeles, California	Inactive
53	Kappa Gamma	May 5, 1946 – 2020	Florida Southern College	Lakeland, Florida	Inactive	[ao]
54	Delta Delta	August 10, 1946	Auburn University	Auburn, Alabama	Active	[ap]
55	Chi Sigma	May 25, 1947 – 1951	Centenary College of Louisiana	Shreveport, Louisiana	Inactive
56	Delta Sigma	March 14, 1948 – 1970; 1988	San Jose State University	San Jose, California	Active	[aq]
57	Gamma Omicron	September 11, 1948	University of Florida	Gainesville, Florida	Active
58	Sigma Omicron	February 27, 1949	Arkansas State University	Jonesboro, Arkansas	Active	[ar]
59	Iota Alpha	February 11, 1950 – 1981	Idaho State University	Pocatello, Idaho	Inactive
60	Phi Omicron	February 25, 1950 – 1985	Hanover College	Hanover, Indiana	Inactive
61	Theta Pi	April 14, 1951	Wagner College	Staten Island, New York	Active	[as]
62	Chi Lambda	June 10, 1951	University of Evansville	Evansville, Indiana	Active	[at]
63	Kappa Rho	September 22, 1951 – 1970; 1986	Western Michigan University	Kalamazoo, Michigan	Active	[au]
64	Sigma Chi	April 19, 1952 – 2020	Hartwick College	Oneonta, New York	Inactive	[av]
65	Kappa Kappa	May 24, 1952	Ball State University	Muncie, Indiana	Active	[aw]
66	Kappa Alpha	March 21, 1953	Indiana State University	Terre Haute, Indiana	Active	[ax]
67	Nu Iota	May 22, 1954 – 1982; 1991–2007	Northern Illinois University	DeKalb, Illinois	Inactive
68	Phi Alpha	April 16, 1955 – 1978; 2016	East Tennessee State University	Johnson City, Tennessee	Active	[ay]
69	Delta Beta	September 22, 1956 – 1983; 1991	University of Louisiana at Lafayette	Lafayette, Louisiana	Active	[az]
70	Gamma Sigma	October 6, 1956	Georgia State University	Atlanta, Georgia	Active	[ba]
71	Beta Lambda	October 13, 1956 – 2000	Illinois Wesleyan University	Bloomington, Indiana	Inactive
72	Phi Lambda	September 28, 1957 – 1982; 2011-2024	Youngstown State University	Youngstown, Ohio	Inactive	[bb]
73	Omega Omicron	October 12, 1957 – 2011	Lambuth University	Jackson, Tennessee	Inactive	[bc]
74	Nu Beta	February 2, 1958	University of Mississippi	Oxford, Mississippi	Active
75	Lambda Tau	March 1, 1958	University of Louisiana at Monroe	Monroe, Louisiana	Active	[bd]
76	Phi Delta	October 25, 1958 – 1995; 2014	University of Wisconsin–Milwaukee	Milwaukee, Wisconsin	Active	[be]
77	Upsilon Alpha	April 11, 1959 – 1982; 1989–1996	University of Arizona	Tucson, Arizona	Inactive
78	Beta Chi	April 25, 1959 – 1981; 2013	Kentucky Wesleyan College	Owensboro, Kentucky	Active	[bf]
79	Zeta Psi	February 6, 1960 – 2005; 2007	East Carolina University	Greenville, North Carolina	Active
80	Chi Omicron	April 30, 1960 – 1966	University of Central Oklahoma	Edmond, Oklahoma	Inactive	[bg]
81	Gamma Tau	May 14, 1960 – 1971	Utah State University	Logan, Utah	Inactive	[bh]
82	Rho Sigma	January 21, 1961 – 1973	Portland State University	Portland, Oregon	Inactive	[bi]
83	Delta Omega	February 18, 1961	Murray State University	Murray, Kentucky	Active	[bj]
84	Phi Kappa	April 22, 1961 – 1981	University of Charleston	Charleston, West Virginia	Inactive	[bk]
85	Sigma Lambda	October 21, 1961 – 1981	University of Wisconsin–La Crosse	La Crosse, Wisconsin	Inactive	[bl]
86	Beta Pi	January 6, 1962 – 1979	Eastern Michigan University	Ypsilanti, Michigan	Inactive	[bm]
87	Delta Pi	May 5, 1962	University of Central Missouri	Warrensburg, Missouri	Active	[bn]
88	Kappa Tau	January 5, 1963	Southeastern Louisiana University	Hammond, Louisiana	Active	[bo]
89	Phi Upsilon	April 20, 1963 – 2003; 2012	Purdue University	West Lafayette, Indiana	Active
90	Theta Omega	November 23, 1963	Northern Arizona University	Flagstaff, Arizona	Active	[bp]
91	Nu Sigma	October 31, 1964 – 1966	Parsons College	Fairfield, Iowa	Inactive	[bq]
92	Lambda Beta	March 27, 1965	California State University, Long Beach	Long Beach, California	Active
93	Beta Rho	April 10, 1965 – 1988	University of Montana	Missoula, Montana	Inactive	[br]
94	Alpha Chi	May 8, 1965	Western Kentucky University	Bowling Green, Kentucky	Active
95	Rho Alpha	February 5, 1966 – 1971	Pan American University	Edinburg, Texas	Inactive
96	Gamma Beta	February 26, 1966 – 1992	Indiana University of Pennsylvania	Indiana, Pennsylvania	Inactive	[bs]
97	Theta Chi	March 19, 1966	Morningside University	Sioux City, Iowa	Active	[bt]
98	Tau Omicron	March 26, 1966	University of Tennessee at Martin	Martin, Tennessee	Active
99	Sigma Sigma	April 23, 1966 – 1968	St. Norbert College	De Pere, Wisconsin	Inactive
100	Sigma Rho	April 30, 1966	Slippery Rock University	Slippery Rock, Pennsylvania	Active
101	Iota Tau	September 24, 1966 – 1984	University of Wisconsin–Stout	Menomonie, Wisconsin	Inactive
102	Kappa Pi	October 1, 1966 – 1995	Ohio Northern University	Ada, Ohio	Inactive
103	Alpha Delta	February 25, 1967	University of Alabama	Tuscaloosa, Alabama	Active
104	Sigma Phi	April 22, 1967 – 2022	California State University, Northridge	Los Angeles, California	Inactive
105	Lambda Phi	April 29, 1967 – 1973	University of Wisconsin–Whitewater	Whitewater, Wisconsin	Inactive	[bu]
106	Iota Sigma	April 20, 1968	Iowa State University	Ames, Iowa	Active
107	Gamma Delta	March 29, 1969	University of South Alabama	Mobile, Alabama	Active	[bv]
108	Alpha Theta	April 12, 1969	Coe College	Cedar Rapids, Iowa	Active	[bw]
109	Chi Pi	April 26, 1969 – 1973	Northeastern University	Boston, Massachusetts	Inactive	[bx]
110	Beta Sigma	April 26, 1969 – 1987; 2016	Boise State University	Boise, Idaho	Active
111	Phi Sigma	May 10, 1969	University of Nebraska at Kearney	Kearney, Nebraska	Active	[by]
112	Nu Zeta	September 13, 1969 – 1977	Chadron State College	Chadron, Nebraska	Inactive
113	Phi Beta	October 4, 1969	East Stroudsburg University of Pennsylvania	East Stroudsburg, Pennsylvania	Active	[bz]
114	Alpha Beta	December 6, 1969 – 1971	Florida Atlantic University	Boca Raton, Florida	Inactive	[ca]
115	Sigma Iota	April 4, 1970 – 1986	Western Illinois University	Macomb, Illinois	Inactive	[cb]
116	Omega Xi	May 16, 1970 – 1985	Morehead State University	Morehead, Kentucky	Inactive	[cc]
117	Theta Kappa	May 23, 1970 – 1974	West Chester University	West Chester, Pennsylvania	Inactive	[cd]
118	Gamma Iota	October 10, 1970 – 1973	Southern Illinois University	Carbondale, Illinois	Inactive
119	Lambda Omega	April 17, 1971 – 1982	Northwest Missouri State University	Maryville, Missouri	Inactive
120	Lambda Chi	May 15, 1971	LaGrange College	LaGrange, Georgia	Active	[ce]
121	Beta Epsilon	May 22, 1971 – 1984	Bemidji State University	Bemidji, Minnesota	Inactive	[cf]
122	Epsilon Iota	February 12, 1972 – 1975	Eastern Illinois University	Charleston, Illinois	Inactive
123	Delta Chi	May 6, 1972 – 1995	University of Delaware	Newark, Delaware	Inactive	[cg]
124	Alpha Kappa	April 14, 1973 – 1983	University of North Alabama	Florence, Alabama	Inactive
125	Chi Alpha	April 5, 1975 – 1997	University of California, Davis	Davis, California	Inactive
126	Sigma Delta	January 31, 1976	Huntingdon College	Montgomery, Alabama	Active
127	Lambda Iota	November 12, 1977 – 1998; 2014	University of California, San Diego	San Diego, California	Active
128	Gamma Alpha	April 22, 1978	George Mason University	Fairfax, Virginia	Active
129	Upsilon Lambda	November 18, 1978	University of Texas at San Antonio	San Antonio, Texas	Active
130	Delta Upsilon	September 8, 1979 – 2008	Duke University	Durham, North Carolina	Inactive
131	Kappa Delta	May 17, 1981 – 1985; 2015	Wright State University	Fairborn, Ohio	Active	[ch]
132	Kappa Omega	March 27, 1982 – 2019	University of Kentucky	Lexington, Kentucky	Inactive
133	Chi Beta	November 13, 1982 – 1997	University of Virginia	Charlottesville, Virginia	Inactive	[ci]
134	Pi Alpha	February 5, 1983	University of Louisville	Louisville, Kentucky	Active	[cj]
135	Delta Theta	February 11, 1984	Texas Woman's University	Denton, Texas	Active
136	Lambda Upsilon	March 24, 1984	Lehigh University	Bethlehem, Pennsylvania	Active
137	Tau Lambda	September 15, 1984	Shippensburg University of Pennsylvania	Shippensburg, Pennsylvania	Active	[ck]
138	Rho Omicron	February 23, 1985	Middle Tennessee State University	Murfreesboro, Tennessee	Active
139	Beta Delta	April 20, 1985 – 1992	Villanova University	Villanova, Pennsylvania	Inactive	[cl]
140	Gamma Theta	September 7, 1985	University of South Florida	Tampa, Florida	Active
141	Phi Chi	November 23, 1985	University of Chicago	Chicago, Illinois	Active
142	Kappa Lambda	November 30, 1985	University of Calgary	Calgary, Alberta, Canada	Active	[cm]
143	Gamma Upsilon	January 11, 1986 – 1992	Saint Leo College	St. Leo, Florida	Inactive	[cn]
144	Delta Alpha	February 8, 1986 – 1994	University of Missouri	Columbia, Missouri	Inactive
145	Alpha Beta Tau	March 1, 1986 – 1992	Thomas More College	Crestview Hills, Kentucky	Inactive	[co]
146	Chi Psi	March 8, 1986	California Polytechnic State University, San Luis Obispo	San Luis Obispo, California	Active
147	Pi Omicron	May 3, 1986 – 1991; 2014	Austin Peay State University	Clarksville, Tennessee	Active
148	Sigma Alpha	August 23, 1986	West Virginia University	Morgantown, West Virginia	Active
149	Rho Beta	September 27, 1986 – 1995; 2008	Virginia Commonwealth University	Richmond, Virginia	Active	[cp]
150	Theta Beta	October 11, 1986	Towson University	Towson, Maryland	Active	[cq]
151	Iota Chi	October 25, 1986	University of Western Ontario	London, Ontario, Canada	Active
152	Zeta Pi	January 24, 1987	University of Alabama at Birmingham	Birmingham, Alabama	Active	[cr]
153	Tau Omega	February 14, 1987	Transylvania University	Lexington, Kentucky	Active
154	Nu Delta	April 4, 1987 – 1998	Canisius College	Buffalo, New York	Inactive
155	Epsilon Omega	April 25, 1987	Eastern Kentucky University	Richmond, Kentucky	Active
156	Epsilon Chi	May 9, 1987	Elon University	Elon, North Carolina	Active
157	Upsilon Epsilon (First)	March 26, 1988 – 1996	Parks College	Cahokia, Illinois	Moved	[cs]
158	Omega Upsilon	April 23, 1988	Ohio University	Athens, Ohio	Active
159	Alpha Lambda	April 30, 1988	Georgia Southern University	Statesboro, Georgia	Active
160	Alpha Psi	April 15, 1989	Bowling Green State University	Bowling Green, Ohio	Active
161	Delta Psi	April 29, 1989 – 2015	State University of New York at Albany	Albany, New York	Inactive	[10][ct]
162	Tau Gamma	May 6, 1989	Eastern Washington University	Cheney, Washington	Active	[cu]
163	Lambda Eta	May 6, 1989	Grand Valley State University	Allendale, Michigan	Active	[cv]
164	Delta Epsilon	March 24, 1990	Jacksonville State University	Jacksonville, Alabama	Active
165	Psi Delta	December 8, 1991 – 1997	C.W. Post Campus of Long Island University	Brookville, New York	Inactive	[cw]
166	Zeta Kappa	April 4, 1992 – 2002	Southwest Texas State University	San Marcos, Texas	Inactive	[cx]
167	Gamma Chi	November 21, 1992	Carleton University	Ottawa, Ontario, Canada	Active	[cy]
168	Kappa Sigma	April 17, 1993	University of Wisconsin–River Falls	River Falls, Wisconsin	Active	[cz]
169	Chi Epsilon	May 22, 1993 – 2022	Ohio State University	Columbus, Ohio	Inactive	[da]
170	Rho Delta	May 7, 1995	Samford University	Homewood, Alabama	Active
171	Delta Rho	June 2, 1996	DePaul University	Chicago, Illinois	Active
157	Upsilon Epsilon (Second)	1996–1997	Saint Louis University	St. Louis, Missouri	Inactive	[cs]
172	Kappa Chi	January 25, 1997	Northwestern State University	Natchitoches, Louisiana	Active
173	Chi Theta	April 26, 1997	Northeastern State University	Tahlequah, Oklahoma	Active
174	Epsilon Sigma	March 20, 1999 – 2024	Quincy University	Quincy, Illinois	Inactive
175	Lambda Omicron	November 14, 1999	Cumberland University	Lebanon, Tennessee	Active
176	Epsilon Gamma	April 29, 2000	University of Northern Colorado	Greeley, Colorado	Active
177	Pi Theta	September 28, 2000	Florida International University	Miami, Florida	Active	[db]
178	Mu Lambda	April 20, 2002	Rollins College	Winter Park, Florida	Active
179	Sigma Beta	April 23, 2005	Saint Joseph's University	Philadelphia, Pennsylvania	Active
180	Chi Phi	April 8, 2006	University of South Carolina Aiken	Aiken, South Carolina	Active
181	Xi Omicron	January 20, 2007	University of Arkansas	Fayetteville, North Carolina	Active
182	Lambda Alpha	May 5, 2007	University of La Verne	La Verne, California	Active
183	Delta Xi	May 19, 2007	Rose–Hulman Institute of Technology	Terre Haute, Indiana	Active	[dc]
184	Lambda Epsilon	February 2, 2008	University of Waterloo	Waterloo, Ontario, Canada	Active
185	Delta Lambda	April 19, 2008	Columbus State University	Columbus, Georgia	Active	[dd]
186	Sigma Gamma	April 4, 2009	Appalachian State University	Boone, North Carolina	Active
187	Delta Kappa	April 25, 2009 – 2021	Washington University in St. Louis	St. Louis, Missouri	Inactive
188	Beta Zeta	April 24, 2010	Kennesaw State University	Kennesaw, Georgia	Active	[11]
189	Delta Tau	April 9, 2011	University of Alabama in Huntsville	Huntsville, Alabama	Active
190	Alpha Nu	April 30, 2011	Ramapo College	Mahwah, New Jersey	Active
191	Beta Upsilon	April 14, 2012	Bryant University	Smithfield, Rhode Island	Active
192	Omega Sigma	April 22, 2012	Oklahoma State University–Stillwater	Stillwater, Oklahoma	Active
193	Theta Iota	May 5, 2012	California State University, San Marcos	San Marcos, California	Active
194	Lambda Rho	November 11, 2012 – 2020	Texas Christian University	Fort Worth, Texas	Inactive
195	Xi Rho	December 1, 2012	Sonoma State University	Rohnert Park, California	Active
196	Upsilon Beta	March 10, 2013	University of Arkansas–Fort Smith	Fort Smith, Arkansas	Active
197	Nu Omega	April 20, 2013	Northern Kentucky University	Highland Heights, Kentucky	Active
198	Iota Theta	April 28, 2013	Monmouth University	West Long Branch, New Jersey	Active
199	Sigma Theta	November 24, 2013	Sam Houston State University	Huntsville, Texas	Active
200	Phi Gamma	December 8, 2013	Georgia College & State University	Milledgeville, Georgia	Active
201	Lambda Delta	April 12, 2014	Dalton State College	Dalton, Georgia	Active
202	Zeta Theta	May 3, 2014 – 2024	California State University, Chico	Chico, California	Inactive
203	Gamma Phi	November 8, 2014	Seton Hall University	South Orange, New Jersey	Active
204	Alpha Mu	November 9, 2014	Duquesne University	Pittsburgh, Pennsylvania	Active
205	Alpha Epsilon	January 25, 2015	Wingate University	Wingate, North Carolina	Active
206	Delta Nu	May 2, 2015	University of Nevada, Reno	Reno, Nevada	Active
207	Theta Sigma	November 21, 2015	Tarleton State University	Stephenville, Texas	Active
208	Beta Nu	January 24, 2016	Illinois State University	Normal, Illinois	Active
209	Beta Eta	February 13, 2016	Gettysburg College	Gettysburg, Pennsylvania	Active
210	Delta Gamma	November 13, 2016	Missouri State University	Springfield, Missouri	Active	[12]
211	Tau Mu	January 22, 2017	Texas A&M University	College Station, Texas	Active	[13]
212	Lambda Lambda	January 29, 2017	University of Connecticut	Storrs, Connecticut	Active
213	Theta Delta	November 12, 2017	Troy University	Troy, Alabama	Active
214	Lambda Psi	January 21, 2018	Arizona State University	Tempe, Arizona	Active
	Alpha Omega				Memorial

1. Chapter formed from Lambda Sigma Phi, established in 1899. It absorbed Lambda Phi in 1924.
2. Chapter formed from Ah Bing, established in 1902.
3. Chapter formed from Alpha Delta Sigma, established in 1900.
4. Chapter formed from the local group J.F.F., established in 1906.
5. Chapter formed from Delta Sigma, established in 1896. It closed when the college banned Greek letter organizations.
6. Chapter formed from Delta Sigma, established in 1895. It was one of two chapters that merged into young Alpha Omicron Pi in 1908 (with the Maine chapter).
7. The fraternity withdrew the chapter's charter from 1969 to 1989 after its members did not participate in rush in protest of "discriminatory rules" of the Tufts Panhellenic Council. Eighteen years after its restoration, the chapter gave a bid to a transgender student in the fall of 2016. The national fraternity delayed its approval of the bid, resulting in half of the chapter's members leaving in October 2016. Although policies were changed to be inclusive, the national executive board withdrew the chapter's charter on December 11, 2017, citing the chapter's "inability to build its membership to sustain a viable AOII membership experience."
8. Chapter was created from a group whose origin was in Phi Gamma (local), established in February, 1897. This local became the Gamma chapter of Delta Sigma, a regional sorority, in 1902. That regional sorority contributed two of its three chapters to Alpha Omicron Pi in 1908.
9. Chapter formed from the Walden Club, established in 1907. It closed when the university abolished sororities.
10. Chapter formed from Delta Omicron, established in 1908.
11. Chapter formed from Pi Theta Phi, established in 1910.
12. Chapter formed from Alathea, established in 1917.
13. Chapter formed from Alpha Upsilon, established in 1911.
14. Chapter formed from Aneves Club, established in 1915.
15. Chapter formed from Alpha Alpha, established in 1916. It closed due to a lack of members.
16. Chapter formed from Pi Sigma, established in 1916.
17. Chapter formed from Beta Gamma, established in 1917.
18. Chapter formed from Kappa Tau Sigma, established in 1911.
19. Chapter formed from Omicron Pi, established in 1920.
20. Chapter formed from Alpha Sigma, established in 1920.
21. Chapter formed from Omicron Tau, established in 1920.
22. Chapter formed from Lambda Tau, established in 1920.
23. Chapter formed from Tau Delta, established in 1919. It went inactive when the college closed in May 2024.
24. Chapter formed from Beta Chi Nu, established in 1919.
25. Chapter formed from Kappa Omicron, established in 1924.
26. Chapter formed from Alpha Rho, established in 1918.
27. Chapter formed from Chi Delta, established in 1926.
28. Chapter formed from Omicron Pi, established in 1925.
29. Chapter formed from Arete Club, established in 1922.
30. Chapter formed from Theta Eta, established in 1925.
31. Chapter formed from Beta Tau, established in 1929.
32. Chapter formed from Alpha Tau Delta, established in 1926.
33. Chapter formed from Alpha Sigma Alpha, established in 1930.
34. Chapter formed from Alpha Gamma, established in 1921.
35. Chapter formed from Pi Delta Phi, established in 1930.
36. Chapter formed from Beta Gamma, established in 1931.
37. Chapter formed from Sigma Tau Delta, established in 1931.
38. Chapter formed from Alpha Omicron, established in 1937.
39. Chapter formed from the local group Kappa Phi.
40. Chapter formed from Phi Theta Psi, established in 1920.
41. Chapter formed from Kappa Gamma Tau, established in 1925.
42. Chapter formed from Phi Omega Pi, established in 1923.
43. Chapter formed from Delta Beta Sigma, established in 1939.
44. Chapter formed from Alpha Sigma, established in 1935.
45. Chapter formed from Theta Pi Epsilon, established in 1941.
46. Chapter formed from the Castalian Literary Society, established in 1905.
47. Chapter formed from Pi Kappa Rho, established in 1934. After going dormant, it reformed from Chi Delphia, established in 1984.
48. Chapter formed from Sigma Delta Nu, established in 1929.
49. Chapter formed from Kappa Kappa, established in 1922.
50. Chapter formed from Kappa Kappa, established in 1906.
51. Chapter formed from Phi Alpha, established in 1945.
52. Chapter formed from Delta Theta Sigma, established in 1917.
53. Chapter formed from Gamma Delta Theta, established in 1954.
54. Chapter formed from Phi Lambda Delta, established in 1927. After dormancy, it reformed from Alpha Omega Pi, established in 1977.
55. Chapter formed from Omega Upsilon Lambda, established in 1926. It went defunct when Lambuth University closed in June 2011.
56. Chapter formed from Phi Lambda Tau, established in 1950.
57. Chapter formed from Phi Delta, established in 1957.
58. Chapter formed from Alpha Beta Chi, established in 1926. After going dormant, it reformed from Theta Omega, established in 2009.
59. Chapter formed from the Criterean Club, established in 1912.
60. Chapter formed from Beta Gamma, established in 1959.
61. Chapter formed from Kappa Epsilon Phi, established in 1959.
62. Chapter formed from Delta Omega, established in 1951.
63. Chapter formed from Phi Kappa Kappa, established in 1928.
64. Chapter formed from Sigma Lambda Sigma, established in 1910.
65. Chapter formed from Beta Pi Gamma, established in 1956.
66. Chapter formed from Pi Delta Pi, established in 1961.
67. Chapter formed from Kappa Rho, established in 1929.
68. Chapter formed from Theta Omega, established in 1960.
69. Chapter went dormant when the college closed.
70. Chapter formed from Kappa Delta Alpha, established in 1963.
71. Chapter formed from Kappa Phi Delta, established in 1965.
72. Chapter formed from Theta Chi Omega, established in 1964.
73. Chapter formed from Phi Lambda Sigma, established in 1959.
74. Chapter formed from Alpha Pi, established in 1968.
75. Chapter formed from Alpha Theta Tau, established in 1966.
76. Chapter formed from Chi Pi Epsilon, established in 1961.
77. Chapter formed from Phi Sigma Phi, established in 1967.
78. Chapter formed from Delta Beta Phi, established in 1966.
79. Chapter formed from Alpha Beta, established in 1967.
80. Chapter formed from Sisters of Western Women, established in 1969.
81. Chapter formed from Delta Omega Xi, established in 1967.
82. Chapter formed from Kappa Theta, established in 1968.
83. Chapter formed from Alpha Phi Beta, established in 1918.
84. Chapter formed from Beta Phi Epsilon, established in 1965.
85. Chapter formed from Delta Chi, established in 1968.
86. Chapter formed from Kappa Delta Chi, established in 1967.
87. Chapter formed from Chi Sigma, established in 1981.
88. Chapter formed from Alpha Pi, established in 1980.
89. Chapter formed from Lambda Zeta Pi, established in 1977.
90. Chapter formed from Pi Beta Delta, established in 1981.
91. Chapter formed from Beta Kappa Lambda, established in 1983.
92. Chapter formed from Gamma Upsilon, established in 1985.
93. Chapter formed from W.I.N.S., established in 1985.
94. Chapter formed from Phi Omega.
95. Chapter formed from Theta Beta, established in 1984.
96. Chapter formed from Zeta Kappa, established in 1985.
97. Chapter was chartered at Parks College in Cahokia, Illinois. St. Louis University absorbed the college, and the chapter moved to St. Louis, Missouri, in 1996. It did not survive the disruption.
98. The sorority has held this group's charter "in trust" since December 2014, meaning that the chapter was suspended. However, a group continued to operate under the same name, which may have been/be a violation of the trademark. The police arrested seven members of this (former, now clandestine?) chapter after noise complaints led to allegations of hazing in November 2016. The university noted that the sorority was off campus and was not recognized by the school.
99. Kappa Beta Gamma, established in 1986.
100. Chapter formed from Delta Alpha Gamma.
101. Chapter formed from Psi Psi Psi, established in 1986.
102. Chapter formed from Zeta Kappa, established in 1989.
103. Chapter formed from Gamma Omicron Pi, established in 1988.
104. Chapter formed from S.S.S.S., established in 1990.
105. Chapter formed from Chi Epsilon Theta, established in 1991.
106. Chapter formed from Kappa Theta, established in 1998.
107. Chapter formed from S.I.G., established in 2004.
108. Chapter formed from Alpha Delta Omega, established in 2003.

Alumnae chapters

In the following list, active chapters are indicated in bold and inactive chapters are indicated in italics.^[2][4]

Chapter	Charter date	State or province	Status	References
Acadiana Alumnae		Louisiana	Active
Aiken, South Carolina Alumnae		South Carolina	Active
Alaska Alumnae		Alaska	Active
Ann Arbor Alumnae		Michigan	Inactive
Athens Alumnae		Georgia	Active
Atlanta Alumnae		Georgia	Active
Austin Alumnae		Texas	Active
Baltimore Alumnae		Maryland	Active
Baton Rouge Alumnae		Louisiana	Active
Birmingham Alumnae		Alabama	Active
Bloomington–Normal Alumnae		Illinois	Active
Boston Alumnae		Massachusetts	Active
Bowling Green Alumnae		Kentucky	Active
Bozeman Alumnae		Montana	Active
Bucks County Alumnae		Pennsylvania	Active
Buffalo Alumnae		New York	Active
Calgary Alumnae		Alberta	Active
Central Connecticut Alumnae		Connecticut	Active
Central Kentucky Bluegrass Alumnae		Kentucky	Active
Central New Jersey Alumnae		New Jersey	Active
Central New Mexico Alumnae		New Mexico	Active
Champaign–Urbana Alumnae		Illinois	Active
Charleston Alumnae		South Carolina	Active
Charlotte Alumnae		North Carolina	Active
Chattanooga Alumnae		Tennessee	Active
Chicago City Alumnae		Illinois	Active
Chicago North Shore Alumnae		Illinois	Inactive
Chicago Northwest Suburban Alumnae		Illinois	Active
Chicago South Suburban Alumnae		Illinois	Active
Chicago West Suburban Alumnae		Illinois	Active
Cincinnati Alumnae		Ohio	Merged	[a]
Cleveland Area Alumnae		Ohio	Active
Cleveland West Alumnae		Ohio	Inactive
College Station Alumane		Texas	Active
Columbus Alumnae		Ohio	Active
Dallas Alumnae		Texas	Active
Dayton Alumnae		Ohio	Active
Dearborn Alumnae		Michigan	Active
DeKalb–Kane Alumnae		Illinois	Active
Delaware Alumnae		Delaware	Active
Denton County Alumnae		Texas	Inactive
Denver Alumnae	May 16, 1927	Colorado	Active	[14]
Detroit North Suburban Alumnae		Michigan	Active
East Bay Alumnae		California	Active
Eastern Iowa Alumnae		Iowa	Active
El Paso Alumnae		Texas	Active
Evansville Tri-State Alumnae		Indiana	Active
Fort Lauderdale Alumnae		Florida	Active
Fort Worth Area		Texas	Active
Grand Rapids Alumnae		Michigan	Inactive
Greater Erie Alumnae		Pennsylvania	Inactive
Greater Gadsden Alumnae		Alabama	Inactive
Greater Greenville Alumnae		North Carolina	Active
Greater Harrisburg Alumnae		Pennsylvania	Active
Greater Jackson Alumnae		Mississippi	Active
Greater Kansas City Alumnae		Missouri	Active
Greater Lee County Alumnae		Florida	Inactive
Greater Los Angeles Alumnae		California	Active
Greater Miami Alumnae		Florida	Inactive
Greater Pensacola Alumnae		Florida	Inactive
Greater Pinellas Alumnae		Florida	Active
Greater Portland Alumnae		Maine	Active
Greater Sacramento Valley Alumnae		California	Active
Greater Vancouver Region Alumnae		British Columbia	Active
Green Bay-Fox Cities Alumnae		Wisconsin	Active
Hammond Area Alumnae		Louisiana	Active
Houston Alumnae		Texas	Active
Huntsville Alumnae		Alabama	Active
Indianapolis Alumnae		Indiana	Active
Inland Empire Alumnae		California	Active
Jersey Shore Alumnae		New Jersey	Active
Jonesboro Alumnae		Arkansas	Active
Kalamazoo Area Alumnae		Michigan	Active
Kearney Alumnae		Nebraska	Active
Kentuckiana Alumnae		Kentucky	Active
Kentucky Lakes Alumnae		Kentucky	Inactive
Knoxville Alumnae		Tennessee	Active
Lake County of Illinois Alumnae		Illinois	Active
Lehigh Valley Alumnae		Pennsylvania	Inactive
Lexington Alumnae		Kentucky	Active
Lincoln Alumnae		Nebraska	Active
Little Rock Area Alumnae		Arkansas	Active
Long Beach Alumnae		California	Inactive
Long Island Alumnae		New York	Active
Las Vegas Alumnae		Nevada	Active
Macomb County Alumnae		Michigan	Active
Madison Alumnae		Wisconsin	Active
Mahoning Valley Alumnae		Ohio	Active
Memphis Area Alumnae		Tennessee	Active
Mid-Missouri Alumnae		Missouri	Active
Middle Georgia Alumnae		Georgia	Inactive
Milwaukee Alumnae		Wisconsin	Active
Minneapolis/St. Paul Alumnae		Minnesota	Active
Mobile Alumnae		Alabama	Active
Mahoning Valley Alumnae		Ohio	Active
Monroe Alumnae		Louisiana	Active
Montgomery Alumnae		Alabama	Inactive
Montreal Alumnae		Quebec	Active
Muncie Alumnae		Indiana	Inactive
Nashville Area Alumnae		Tennessee	Active
New Hampshire Alumnae		New Hampshire	Active
New Orleans Area Alumnae		Louisiana	Active
New York Capital Region Alumnae		New York	Inactive
New York City Area Alumnae	May 21, 1904	New York	Active
New York/New Jersey Metro Alumnae		New York	Active
North Bay Alumnae		California	Inactive
North Carolina Foothills Alumnae		North Carolina	Active
Northeast Oklahoma		Arkansas	Inactive
Northern Arizona Alumnae		Arizona	Active
Northern Kentucky/Cincinnati Area Alumnae		Kentucky	Active	[b]
Northern New Jersey Alumnae		New Jersey	Active
Northern Orange County Alumnae		California	Active
Northern Virginia Alumnae		Virginia	Active
Northwest Arkansas Alumnae		Arkansas	Active
Northwest Georgia Alumnae		Georgia	Active
Oklahoma City Metro Area Alumnae		Oklahoma	Active
Omaha Alumnae		Nebraska	Inactive
Orlando Area Alumnae		Florida	Active
Ottawa Alumnae		Ontario	Active
Oxford Area		Mississippi	Active
Palm Beach County Alumnae		Florida	Active
Palo Alto Alumnae		California	Active
Palouse Area Alumnae		Washington	Inactive
Philadelphia Alumnae		Pennsylvania	Active
Piedmont Alumane of North Carolina		North Carolina	Active
Phoenix Alumnae		Arizona	Active
Pocatello Alumnae		Idaho	Active
Portland Alumnae		Oregon	Active
Reno-Tahoe Alumnae		Nevada	Active
Rhode Island Alumnae		Rhode Island	Active
Richmond Area Alumnae		Virginia	Active
Rochester Alumnae		New York	Active
Rocky Mountain Alumnae		Colorado	Inactive
St. Louis Alumnae		Missouri	Active
Salt Lake City Alumnae		Utah	Inactive
San Antonio Alumnae		Texas	Active
San Diego Alumnae		California	Active
San Fernando Valley Alumnae		California	Active
San Francisco Alumnae		California	Active
San Gabriel Valley Alumnae		California	Active
San Jose Alumnae		California	Active
San Mateo Alumnae		California	Active
Santa Barbara Alumnae		California	Inactive
Sarasota Area Alumnae		Florida	Active
Savannah Alumnae		Georgia	Inactive
Sea to Sky Alumnae		British Columbia	Active
Seattle Alumnae		Washington	Active
Shreveport Area Alumnae		Louisiana	Active
South Bay/Palos Verdes Alumnae		California	Inactive
Southern Orange County Alumnae		California	Active
Southport Alumnae		North Carolina	Inactive
Southwestern Ontario Alumnae		Ontario	Inactive
State College Alumnae		Pennsylvania	Active
Suburban Maryland Alumnae		Maryland	Active
Tallahassee Alumnae		Florida	Active
Tampa Bay Alumnae		Florida	Active
Terre Haute Alumnae		Indiana	Inactive
Toledo Area Alumnae		Ohio	Active
Treasure Valley Aumnae		Idaho	Active
Triangle Alumnae		North Carolina	Active
Toronto Area Alumnae		Ontario	Active
Tucson Alumnae		Arizona	Inactive
Tulsa Alumnae		Oklahoma	Active
Tuscaloosa Alumnae		Alabama	Inactive
Ventura County Alumnae		California	Active
Virginia Tidewater Alumnae		Virginia	Active
Western Potomac Area Alumnae		Virginia	Active
Williamsburg Alumnae		Virginia	Active
Winston–Salem Alumnae		North Carolina	Inactive

1. Chapter merged with the Northern Kentucky Alumnae chapter
2. Chapter started as the Northern Kentucky Alumnae chapter but changed its name when it merged with the Cincinnati Alumnae chapter.

See also

• List of Alpha Omicron Pi members