Lincoln County is a county located in the U.S. state of Mississippi. As of the 2020 census, the population was 34,907. Its county seat is Brookhaven.

Brookhaven is a small city in Lincoln County, Mississippi, United States, 55 miles (89 km) south of the state capital of Jackson. The population was 11,674 people at the 2020 U.S. Census. It is the county seat of Lincoln County. It was named after the town of Brookhaven, New York, by founder Samuel Jayne in 1818.