Fairfield County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 158,921. Its county seat and largest city is Lancaster. Its name is a reference to the Fairfield area of the original Lancaster. Fairfield County is part of the Columbus, OH Metropolitan Statistical Area.
Country: United States
State: Ohio
Founded: December 9, 1800
Named for: the Fairfield area of Lancaster, Lancashire, UK
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