Nashville is a city in Howard County, Arkansas, United States. The population was 4,627 at the 2010 census. The estimated population in 2015 was 4,479. The city is the county seat of Howard County.Nashville is situated at the base of the Ouachita foothills and was once a major center of the peach trade in southwest Arkansas. Today the land is mostly given over to cattle and chicken farming. The world's largest dinosaur trackway was discovered near the town in 1983.