
Demopolis
- County:
- Marengo County
- County Seat:
- No
- Area (mi²):
- 17.744
- State:
- Alabama
Demopolis is a city located in Marengo County, Alabama. Demopolis has a 2025 population of 6,627. Demopolis is currently declining at a rate of -1.53% annually and its population has decreased by -7.21% since the most recent census, which recorded a population of 7,142 in 2020.
The average household income in Demopolis is $71,046 with a poverty rate of 26.52%. The median age in Demopolis is 43.4 years: 45.3 years for males, and 40.2 years for females.