Pen Mar, Pennsylvania

Pen Mar is an unincorporated community and census-designated place (CDP) that is located in Washington Township of Franklin County, Pennsylvania, United States. It is one of the border towns in the United States with a portmanteau name. It is situated on the Mason–Dixon line, bordered to the south by the community of Pen Mar in Maryland.

Pen Mar, Pennsylvania
Census-designated place
Pen Mar Show map of Pennsylvania Pen Mar Show map of the United States
Coordinates: 39°43′27″N 77°30′54″W
Country	United States
State	Pennsylvania
County	Franklin
Township	Washington
Area [1]
• Total	0.75 sq mi (1.93 km2)
• Land	0.74 sq mi (1.91 km2)
• Water	0.01 sq mi (0.02 km2)
Elevation [2]	899 ft (274 m)
Population  (2020)[3]
• Total	947
• Density	1,281.46/sq mi (495.04/km2)
Time zone	UTC-5 (Eastern (EST))
• Summer (DST)	UTC-4 (EDT)
ZIP code	17268
FIPS code	42-58776
GNIS feature ID	2634268[2]

History

The community's name is a portmanteau of "Pennsylvania" and "Maryland".^[4]

Geography

Pen Mar is located in southeastern Franklin County, on the western slope of South Mountain. Pennsylvania Route 550 is the main road through the community, leading northwest down the mountain 2 miles (3 km) to Rouzerville. Waynesboro is 4.5 miles (7.2 km) northwest of Pen Mar, and the site of the former Fort Ritchie in Maryland is 1 mile (1.6 km) to the southeast.

Demographics

As of the 2020 census, the population of Pen Mar was 947.^[5]

Historical population

Census	Pop.	Note	%±
2010	929		—
2020	947		1.9%
U.S. Decennial Census[6]