Paul B. Johnson State Park is a public recreation area on the shores of Geiger Lake, located off U.S. Highway 49 in McLaurin, Mississippi, 12 miles (19 km) south of Hattiesburg.

The state park is named after Paul B. Johnson, the forty-sixth governor of Mississippi.

The park is situated on rolling hills that contain flowering dogwoods, southern yellow pines, and oaks.

The lake is stocked with largemouth bass, bluegill, shellcracker, crappie, and channel catfish.

The park features 25 primitive tent-camping areas, 125 RV camping pads with water, sewer and electrical hookups, and 16 vacation cabins.