Fairfield County Flag

Fairfield County

State:
Ohio
County Seat:
Lancaster

Fairfield County's estimated 2025 population is 169,894 with a growth rate of 1.27% 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 16.04% since that time.

169,894
Total Population
337
Population Density (mi²)
19
Population Rank (State)
2.1K 1.27%
Annual Population Growth

Fairfield County Population

Demographics

Economics and Income Statistics

Sources

  1. City and Town Population Totals: 2020-2024
  2. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  3. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  4. American Community Survey (2009 - 2013)
  5. Census QuickFacts
  6. Historical Populations of States and Counties (1790 - 1990)