
Middletown
- County:
- Jefferson County
- County Seat:
- No
- Area (mi²):
- 5.136
- State:
- Kentucky
Middletown is a city located in Jefferson County, Kentucky. Middletown has a 2025 population of 9,573. Middletown is currently declining at a rate of -0.29% annually and its population has decreased by -1.46% since the most recent census, which recorded a population of 9,715 in 2020.
The average household income in Middletown is $98,475 with a poverty rate of 11.72%. The median age in Middletown is 43.9 years: 43.8 years for males, and 44 years for females.