New Marshfield is a CDP located in Athens County, Ohio. New Marshfield has a 2026 population of 40. New Marshfield is currently declining at a rate of -31.03% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.
The median age in New Marshfield is 62.1 years: 58.1 years for males, and 63.5 years for females. For every 100 females there are 163.4 males.
Data after 2023 is projected based on recent change
Overall: 62.1 years
Female: 63.5 years
Male: 58.1 years
There are 187 adults, (40 of whom are seniors) in New Marshfield.
Female: 71 (38%)
Male: 116 (62%)
The racial composition of New Marshfield includes 90.37% White, and smaller percentages for and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 169 | 90.37% |
| Two or more races | 18 | 9.63% |