The W. F. Ramsey Unit (previously Ramsey I Unit) is a Texas Department of Criminal Justice prison farm located in unincorporated Brazoria County, Texas, with a Rosharon postal address; it is not inside the Rosharon census-designated place. The prison is located on Farm to Market Road 655, 4 miles (6.4 km) west of Farm to Market Road 521, and south of Houston. The 16,369-acre (6,624 ha) unit is co-located with the Stringfellow Unit and the Terrell Unit.