Round Lake, Mississippi

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 mi west of Duncan and approximately 2 mi north of Deeson. Round Lake is located on the former Yazoo and Mississippi Valley Railroad. Round Lake was formerly home to three general stores and two grocery stores.

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