
Plainville
- County:
- Hamilton County
- County Seat:
- No
- Area (mi²):
- 0.091
- State:
- Ohio
Plainville is a CDP located in Hamilton County, Ohio. Plainville has a 2025 population of 76. Plainville is currently growing at a rate of 7.04% annually but its population has decreased by -50.33% since the most recent census, which recorded a population of 153 in 2020.
The average household income in Plainville is $127,111 with a poverty rate of 37.8%. The median age in Plainville is 60.5 years: 82.1 years for males, and 60.4 years for females.