A study from WalletHub says that Nashville's demographics most closely mirror the U.S. average as a whole. 

To determine which cities mirror the United States more than others, WalletHub examined demographical statistics for 366 of the largest metropolitan areas in the U.S. The data set includes 26 key metrics, among which are age, gender and income as well as household makeup and housing tenure. By studying these factors, it aims to help consumers identify the cities that best address their different priorities.

Nashville ranked just ahead of Cincinnati and Indianapolis. Charleston, S.C., and Jacksonville, Fla., rounded out the top 5.