Fairfield County Flag

Fairfield County

State:
Ohio
County Seat:
Lancaster

Fairfield County's estimated 2026 population is 171,798 with a growth rate of 1.21% in the past year according to the most recent United States census data. Fairfield County is the 19th largest county in Ohio. The 2010 population was 146,408 and has seen a growth of 17.34% since that time.

171,798
Total Population
341
Population Density (mi²)
19
Population Rank (State)
2K 1.21%
Annual Population Growth

Fairfield County Population

Demographics

Economics and Income Statistics