Washington County Flag

Washington County

State:
Ohio
County Seat:
Marietta

Washington County's estimated 2025 population is 57,995 with a growth rate of -0.5% in the past year according to the most recent United States census data. Washington County is the 45thlargest county in Ohio. The 2010 population was 61,714 and has seen a growth of -6.03% since that time.

57,995
Total Population
92
Population Density (mi²)
45
Population Rank (State)
-291 -0.5%
Annual Population Growth

Washington 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)