
Middletown
- County:
- Butler County
- County Seat:
- No
- Area (mi²):
- 26.181
- State:
- Ohio
Middletown is a city located in Butler County, Ohio. Middletown has a 2025 population of 51,780. Middletown is currently growing at a rate of 0.29% annually and its population has increased by 1.48% since the most recent census, which recorded a population of 51,025 in 2020.
The average household income in Middletown is $69,981 with a poverty rate of 19.04%. The median age in Middletown is 38.3 years: 36.3 years for males, and 40.5 years for females.