
Marietta township
- County:
- Washington County
- County Seat:
- No
- Area (mi²):
- 14.822
- State:
- Ohio
Marietta township is located in Washington County, Ohio. Marietta township has a 2025 population of 4,164. Marietta township is currently declining at a rate of -0.48% annually and its population has decreased by -2.6% since the most recent census, which recorded a population of 4,275 in 2020.
The average household income in Marietta township is $66,782 with a poverty rate of 12.63%. The median age in Marietta township is 49.4 years: 45.6 years for males, and 55 years for females.