Tallapoosa County is located in the east-central portion of the U.S. state of Alabama. As of the 2020 census, the population was 41,311. Its county seat is Dadeville. Its largest city is Alexander City.

Dadeville is a city in and the county seat of Tallapoosa County, Alabama, United States. At the 2010 census the population was 3,230, up from 3,212 in 2000.