Petal is a city in Forrest County, Mississippi, along the Leaf River. It is part of the Hattiesburg, Mississippi Metropolitan Statistical Area. The population was 7,579 at the 2000 census. The American Checkers Federation is based in Petal, MS. Petal apartments for rent comparison page shows most up to date rent information on Petal apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.