Adams County, Pennsylvania

Adams County
Location within the U.S. state of Pennsylvania
Pennsylvania's location within the U.S.
Coordinates: 39°52′N 77°13′W / 39.87°N 77.22°W / 39.87; -77.22
Country United States
State Pennsylvania
FoundedJanuary 22, 1800
Named afterJohn Adams
SeatGettysburg
Largest boroughGettysburg
Area
  Total
522 sq mi (1,350 km2)
  Land519 sq mi (1,340 km2)
  Water3.1 sq mi (8 km2)  0.6%
Population
 (2020)
  Total
103,852
  Estimate 
(2022)
106,027
  Density200/sq mi (80/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional district13th
Websitewww.adamscountypa.gov
TypeCity
DesignatedNovember 6, 1982

Adams County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 103,852. Its county seat is Gettysburg. The county was created on January 22, 1800, from part of York County, and was named for John Adams, the second President of the United States.

Between July 1 and July 3, 1863, the Battle of Gettysburg, the bloodiest and most significant battle of the American Civil War, was fought near Gettysburg. As a result, Adams County is a center for Civil War-related tourism. Adams County comprises the Gettysburg metropolitan statistical area, which is also included in the Harrisburg–York–Lebanon combined statistical area. The county is part of the South Central region of the commonwealth.