Fairfield County, Ohio

Fairfield County
Fairfield County Courthouse
Fairfield County Courthouse
Official seal of Fairfield County
Map of Ohio highlighting Fairfield County
Location within the U.S. state of Ohio
Map of the United States highlighting Ohio
Ohio's location within the U.S.
Coordinates: 39°45′N 82°38′W / 39.75°N 82.63°W / 39.75; -82.63
Country United States
State Ohio
FoundedDecember 9, 1800[1]
Named forthe Fairfield area of Lancaster, Lancashire, UK
SeatLancaster
Largest cityLancaster
Area
 • Total
509 sq mi (1,320 km2)
 • Land504 sq mi (1,310 km2)
 • Water4.2 sq mi (11 km2)  0.8%
Population
 (2020)
 • Total
158,921 Increase
 • Density310/sq mi (120/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional district12th
Websitewww.co.fairfield.oh.us

Fairfield County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 158,921.[2] Its county seat and largest city is Lancaster.[3] Its name is a reference to the Fairfield area of the original Lancaster. Fairfield County is part of the Columbus, OH Metropolitan Statistical Area.

  1. ^ "Ohio County Profiles: Fairfield County" (PDF). Ohio Department of Development. Archived from the original (PDF) on 2009-03-26. Retrieved 2007-04-28.
  2. ^ "2020 Population and Housing State Data". US Census Bureau.
  3. ^ "Find a County". National Association of Counties. Archived from the original on 2011-05-31. Retrieved 2011-06-07.