Nashville is a city located in Washington County Illinois. Nashville has a 2020 population of 3,347. It is also the county seat of Washington County. Nashville is currently declining at a rate of -0.95% annually and its population has decreased by -8.68% since the most recent census, which recorded a population of 3,665 in 2010. Nashville reached it's highest population of 3,665 in 2010.
The average household income in Nashville is $73,194 with a poverty rate of 6.73%. The median rental costs in recent years comes to $729 per month, and the median house value is $135,600. The median age in Nashville is 44.3 years, 41.9 years for males, and 46 years for females.