Sullivan County, Pennsylvania

Sullivan County
Sullivan County Courthouse in Sullivan County, September 2006
Location within the U.S. state of Pennsylvania
Pennsylvania's location within the U.S.
Coordinates: 41°27′N 76°31′W / 41.45°N 76.51°W / 41.45; -76.51
Country United States
State Pennsylvania
FoundedMarch 15, 1847
Named afterCharles C. Sullivan
SeatLaporte
Largest boroughDushore
Area
  Total
452 sq mi (1,170 km2)
  Land450 sq mi (1,200 km2)
  Water2.6 sq mi (7 km2)  0.6%
Population
  Estimate 
(2020)
5,840
  Density13/sq mi (5/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional district9th
Websitewww.sullivancounty-pa.us

Sullivan County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 5,840, making it the second-least populous county in Pennsylvania. Its county seat is Laporte. The county was created on March 15, 1847, from part of Lycoming County and named for Major General John Sullivan. The county is part of the Northeast Pennsylvania region of the state.