Sumrall is a town in Lamar County, Mississippi. It is part of the Hattiesburg, Mississippi Metropolitan Statistical Area. The population was 1,421 at the 2010 census.

Lamar County is a county located in the U.S. state of Mississippi. As of the 2020 census, the population was 64,222. Its county seat is Purvis. Named for Confederate Lucius Quintus Cincinnatus Lamar, the county was carved out of Marion County to the west in 1904.