Selmer is a town in McNairy County, Tennessee, United States, in the southwestern part of the state. The population was 4,541 at the 2000 census. It is the county seat of McNairy County. It is named after Selma, Alabama.
Buford Pusser served as the sheriff of McNairy County from 1964 to 1970.
As of the census of 2000, there were 4,541 people, 1,935 households, and 1,234 families residing in the town. The population density was 464.5 people per square mile (179.3/km²). There were 2,173 housing units at an average density of 222.3 per square mile (85.8/km²). The racial makeup of the town was 81.61% White, 15.92% African American, 0.22% Native American, 0.26% Asian, 0.37% from other races, and 1.61% from two or more races. Hispanic or Latino of any race were 1.54% of the population.