Round Lake, also spelled Roundlake, is an unincorporated community located in Bolivar County, Mississippi, United States along Mississippi Highway 1.

Round Lake is approximately 7 miles (11 km) west of Duncan and approximately 2 miles (3.2 km) north of Deeson.

Round Lake is located on the former Yazoo and Mississippi Valley Railroad.

[3] A post office operated under the name Roundlake from 1891 to 1968.

This Mississippi-related article is a stub.