Power Distribution Service Companies
| Santee Cooper (North Myrtle Bea, SC) |
| Santee Cooper (Conway, SC)
Primarily Serving: Wilmington, NC - Mount Pleasant, SC - Fayetteville, NC - North Charleston, SC |
| Santee Cooper (Moncks Corner, SC)
Primarily Serving: North Charleston, SC - Charleston, SC - Mount Pleasant, SC - Columbia, SC |
| Satilla Remc (Alma, GA)
Primarily Serving: Valdosta, GA - Savannah, GA - Cobb, GA - Jacksonville, FL |
| Semo Electric (Bloomfield, MO)
Primarily Serving: Jonesboro, AR - Jackson, TN - Saint Louis, MO - Memphis, TN |
| Shelby Energy Cooperative Inc (Bedford, KY)
Primarily Serving: Louisville, KY - Lexington, KY - Cincinnati, OH - Hamilton, OH |
| Sheldon Point Electric Co (Nunam Iqua, AK) |
| Sierra Pacific Power Co (Reno, NV)
Primarily Serving: Sparks, NV - Carson City, NV - El Dorado, CA - Loomis, CA |
| So Nh Hydro Electric Dev Corp (South Berwick, ME)
Primarily Serving: Haverhill, MA - Portland, ME - Manchester, NH - Lawrence, MA |
| South Carolina Electric & Gas (Gaston, SC)
Primarily Serving: Columbia, SC - Augusta, GA - Rock Hill, SC - North Charleston, SC |
| South Carolina Public Svc Auth (Conway, SC)
Primarily Serving: Wilmington, NC - Mount Pleasant, SC - Fayetteville, NC - North Charleston, SC |
| South Carolina Public Svc Auth (Moncks Corner, SC)
Primarily Serving: North Charleston, SC - Charleston, SC - Mount Pleasant, SC - Columbia, SC |
| South Central Electric Assn (Jeffers, MN)
Primarily Serving: Sioux Falls, SD - Lakeville, MN - Eden Prairie, MN - Minnetonka, MN |
| South Jersey Energy Solutions (Hammonton, NJ)
Primarily Serving: Vineland, NJ - Camden, NJ - Philadelphia, PA - Levittown, PA |
| Southeastern Electric Coop (Viborg, SD)
Primarily Serving: Sioux Falls, SD - Sioux City, IA - Omaha, NE - Council Bluffs, IA |
| Southern California Edison Co (Ventura, CA)
Primarily Serving: Oxnard, CA - Camarillo, CA - Thousand Oaks, CA - Santa Barbara, CA |
| Southern Co (Gillette, WY)
Primarily Serving: Casper, WY - Rapid City, SD - Billings, MT - Cheyenne, WY |
| Southern Co Plant Watson (Gulfport, MS)
Primarily Serving: Mobile, AL - Hattiesburg, MS - New Orleans, LA - Metairie, LA |
| Southern Power District (Franklin, NE)
Primarily Serving: Lincoln, NE - Manhattan, KS - Omaha, NE - Bellevue, NE |
| Southwest Texas Electric Co-Op (Eldorado, TX)
Primarily Serving: San Angelo, TX - Abilene, TX - Midland, TX - Odessa, TX |
| Southwest Texas Electric Svc (Eldorado, TX)
Primarily Serving: San Angelo, TX - Abilene, TX - Midland, TX - Odessa, TX |
| Spalding Municipal Light/Power (Spalding, NE)
Primarily Serving: Lincoln, NE - Sioux City, IA - Omaha, NE - Bellevue, NE |
| Steamboat Envirosystems (Reno, NV)
Primarily Serving: Sparks, NV - Carson City, NV - El Dorado, CA - Loomis, CA |
| Stucco Power Inc (San Jose, CA)
Primarily Serving: Santa Clara, CA - Milpitas, CA - Sunnyvale, CA - Cupertino, CA |
| Sumner Municipal Light Plant (Sumner, IA)
Primarily Serving: Waterloo, IA - Cedar Rapids, IA - Dubuque, IA - La Crosse, WI |
