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. Prior to its incorporation, Dadeville was an Indian trading post and a center of commerce where commodities such as cotton, lumber, tin, asbestos, and livestock were traded. The town was surveyed by John H. Broadnax in 1836, granted a charter in 1837, and first incorporated in 1858. Dadeville was named for Major Francis Langhorne Dade, who was killed in 1835 by Seminole Indians in a battle of the Second Seminole War that came to be known as the "Dade Massacre". Dade had never actually visited Tallapoosa County.