Bonneau is a town in Berkeley County, South Carolina. Bonneau is located in north-central Berkeley County on the east shore of Lake Moultrie. Lake Moultrie is a 60,000 acre man made lake operated by Santee Cooper. It is known for large fish and abundant wildlife. Public access is through public boat ramps, and the Diversion Canal into Lake Marion and the Pinopolis Locks into the Tail Race Canal leading into the Cooper River. Additional access is provided by the Palmetto Trail leading around the extensive dike system of the lake.