Cooper Lake State Park is a Texas State Park in Delta and Hopkins counties, about three miles (5 km) south of Cooper, Texas. The park is situated on Jim Chapman Lake, formerly known as Cooper Lake. There are actually two geographically separate units; the Doctors Creek unit 33°20′54″N 95°40′08″W is located on the north side of the lake, in Delta County, while the South Sulphur unit 33°17′49″N 95°39′35″W is located on the south side of the lake, in Hopkins County.