Pennsylvania House of Representatives, District 55

The 55th Pennsylvania House of Representatives district is located in southwest Pennsylvania and has been represented by Jill N. Cooper since 2023.

Pennsylvania's 55th State House of Representatives district
Representative	Jill N. Cooper R–Murrysville
Population (2022)	66,435

District profile

The 55th district is located in Westmoreland County and includes the following areas:^[1]

• Arnold
• Avonmore
• Bell Township
• Delmont
• Derry Township (part)
  • District Alters
  • District Simpsons
• Export
• Lower Burrell (part)
  • Ward 04 (part)
    • Division 01
• Loyalhanna Township
• Murrysville
• New Alexandria
• New Kensington
• Oklahoma
• Salem Township
• Upper Burrell Township
• Washington Township

Representatives

Representative	Party	Years	District home	Note
Prior to 1969, seats were apportioned by county.
Gust L. Stemmler	Democrat	1969 – 1972
Joseph A. Petrarca, Sr.	Democrat	1973 – 1994
Joseph A. Petrarca, Jr.	Democrat	1995 - 2021	Vandergrift
Jason Silvis	Republican	2021 - 2023
Jill N. Cooper	Republican	2023–present		Incumbent

Recent election results

PA House election, 2024:
Pennsylvania House, District 55

Party		Candidate	Votes	%
	Republican	Jill Cooper (incumbent)	26,389	67.80
	Democratic	Davon Magwood	12,535	32.20
Total votes			38,924	100.00
	Republican hold

PA House election, 2022:
Pennsylvania House, District 55

Party		Candidate	Votes	%
	Republican	Jill Cooper	18,523	61.52
	Democratic	Scott Gauss	11,585	38.48
Total votes			30,108	100.00
	Republican hold

PA House election, 2020:
Pennsylvania House, District 55

Party		Candidate	Votes	%
	Republican	Jason Silvis	16,336	52.28
	Democratic	Joseph Petrarca, Jr. (incumbent)	14,914	47.72
Total votes			31,250	100.00
	Republican gain from Democratic

PA House election, 2018:
Pennsylvania House, District 55

Party		Candidate	Votes	%
	Democratic	Joseph Petrarca, Jr. (incumbent)	Unopposed
Total votes			14,579	100.00
	Democratic hold

PA House election, 2016:
Pennsylvania House, District 55

Party		Candidate	Votes	%
	Democratic	Joseph Petrarca, Jr. (incumbent)	15,554	56.39
	Republican	Michael Geiselhart	12,028	43.61
Total votes			27,582	100.00
	Democratic hold