Three companies supply electrical power to DeSoto County. Northcentral Electric Power Association provides service to the eastern area of the county, including Olive Branch. Entergy Corporation supplies service to the areas of the county that include Hernando, Horn Lake, and Southaven. A portion of the western side of DeSoto County, including the Walls area, is serviced by Coahoma Electric.
Atmos Energy provides natural gas service to the majority of the county, while the City of Olive Branch provides natural gas to its residential, commercial, and industrial customers.