Marietta Flag

Marietta

County Seat:
Yes
Area (mi²):
8.429
State:
Ohio

Marietta is a city located in Washington County, Ohio. Marietta has a 2026 population of 13,039. It is also the county seat of Washington County. Marietta is currently declining at a rate of -0.34% annually and its population has decreased by -2.41% since the most recent census, which recorded a population of 13,361 in 2020.

13K
Total Population
1,547
Density (mi²)
-45 -0.34%
Growth

Nearby Cities

Sources

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