
New Marshfield
- County:
- Athens County
- County Seat:
- No
- Area (mi²):
- 0.392
- State:
- Ohio
New Marshfield is a CDP located in Athens County, Ohio. New Marshfield has a 2025 population of 148. New Marshfield is currently declining at a rate of -7.5% annually and its population has decreased by -37.29% since the most recent census, which recorded a population of 236 in 2020.
The average household income in New Marshfield is $51,243 with a poverty rate of 40.43%. The median age in New Marshfield is 63.3 years: 0 years for males, and 63.8 years for females.