Butler County is a county located in the south central portion of the U.S. state of Alabama. As of the 2020 census, the population was 19,051. Its county seat is Greenville. Its name is in honor of Captain William Butler, who was born in Virginia and fought in the Creek War, and who was killed in May 1818.

Greenville is a city and the county seat of Butler County, Alabama, United States. At the 2020 census, the population was 7,374. Greenville is known as the Camellia City, wherein originated the movement to change the official Alabama state flower from the goldenrod to the camellia with legislative sponsors LaMont Glass and H.B. Taylor.