| Official Name: | Round Lake, Mississippi |
| Pushpin Map: | Mississippi#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Mississippi |
| Subdivision Type2: | County |
| Subdivision Name2: | Bolivar |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 161 |
| Coordinates: | 34.0533°N -90.8528°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 38746 |
| Area Code: | 662 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 67691 |
Round Lake, also spelled Roundlake, is an unincorporated community located in Bolivar County, Mississippi, United States along Mississippi Highway 1. Round Lake is approximately 7miles west of Duncan and approximately 2miles north of Deeson. Round Lake is located on the former Yazoo and Mississippi Valley Railroad.[1] Round Lake was formerly home to three general stores and two grocery stores.[2]
A post office operated under the name Roundlake from 1891 to 1968.[3]