
Middletown
- County:
- Frederick County
- County Seat:
- No
- Area (mi²):
- 2.118
- State:
- Maryland
Middletown is a town located in Frederick County, Maryland. Middletown has a 2025 population of 5,536. Middletown is currently growing at a rate of 2.12% annually and its population has increased by 11.55% since the most recent census, which recorded a population of 4,963 in 2020.
The average household income in Middletown is $190,704 with a poverty rate of 1.53%. The median age in Middletown is 40.7 years: 39.3 years for males, and 41.2 years for females.