Eva is an unincorporated community and census-designated place (CDP) in Benton County, Tennessee, United States, on the western shore of the Kentucky Lake impoundment of the Tennessee River. It is the site of Nathan Bedford Forrest State Park. As of the 2010 census, its population was 293. The ZIP Code Tabulation Area for the ZIP code (38333) that serves Eva had a population of 574 as of the 2000 U.S. Census, when Eva was not yet a CDP.