
Nashville
- County:
- Washington County
- County Seat:
- Yes
- Area (mi²):
- 3.081
- State:
- Illinois
Nashville is a city located in Washington County, Illinois. Nashville has a 2025 population of 2,961. It is also the county seat of Washington County. Nashville is currently declining at a rate of -0.87% annually and its population has decreased by -4.17% since the most recent census, which recorded a population of 3,090 in 2020.
The average household income in Nashville is $68,480 with a poverty rate of 7.49%. The median age in Nashville is 43.2 years: 43.7 years for males, and 42.5 years for females.