Fairfield County Ohio (Historic Districts) has 6 places on the National Register of Historic Places including 2 places of Statewide significance. Significant places include Lancaster Methodist Episcopal Camp Ground Historic District and Square 13 Historic District, Fairfield County Children's Home, Lancaster Historic District and Lancaster West Main Street Historic District.
Some of the country's most noteable architects helped create the Fairfield County places including Daniel Sifford. Prominent architectural styles found in Fairfield Country are Federal, Greek Revival and Art Deco.