| Utility | State | Customers | Residential rate |
|---|
| Wagoner Public Works Authority | OK | 3,866 | — |
| Wake Electric Membership Corp | NC | 58,987 | 14.29¢ |
| Walters Public Works Authority | OK | 1,213 | — |
| Walton Electric Member Corp | GA | 144,918 | 14.10¢ |
| WAPA-- Western Area Power Administration | CA | 233 | — |
| Warren County Rural E M C | IN | 5,033 | — |
| Warren Electric Coop Inc | PA | 8,693 | — |
| Warren Rural Elec Coop Corp | KY | 77,362 | 12.67¢ |
| Wasco Electric Coop, Inc | OR | 4,757 | — |
| Washington Elec Member Corp | GA | 16,319 | 15.36¢ |
| Washington Electric Coop - (OH) | OH | 10,539 | — |
| Washington Electric Coop - (VT) | VT | 12,250 | — |
| Washington Island El Coop, Inc | WI | 1,115 | — |
| Washington-St Tammany E C, Inc | LA | 55,752 | 11.04¢ |
| Waterloo Light & Water Comm | WI | 1,919 | 14.69¢ |
| Watertown Municipal Utilities | SD | 14,497 | 9.29¢ |
| Waupun Utilities | WI | 4,549 | 12.35¢ |
| Waverly Municipal Elec Utility - (IA) | IA | 5,232 | — |
| Wayne-White Counties Elec Coop | IL | 13,655 | 16.39¢ |
| Weakley County Mun Elec Sys | TN | 20,893 | 12.29¢ |
| Weatherford Mun Utility System | TX | 17,189 | 12.80¢ |
| Webster Electric Coop | MO | 19,901 | 10.35¢ |
| Wells Rural Electric Co | NV | 6,513 | 10.27¢ |
| Wellsborough Electric Co | PA | 6,445 | 19.01¢ |
| Wellton-Mohawk Irr & Drain Dist | AZ | 4,264 | — |
| West Central Electric Coop Inc - (MO) | MO | 15,724 | 12.93¢ |
| West Central Electric Coop Inc - (SD) | SD | 6,815 | — |
| West Florida El Coop Assn, Inc | FL | 30,191 | 16.65¢ |
| West Kentucky Rural E C C | KY | 39,271 | 14.17¢ |
| West Oregon Electric Coop Inc | OR | 4,620 | — |
| West Point Utility System | IA | 860 | — |
| West River Electric Assn Inc | SD | 21,332 | 15.16¢ |
| Western Coop Electric Assn Inc | KS | 12,072 | 14.56¢ |
| Western Illinois Elec Coop | IL | 3,573 | — |
| Western Indiana Energy REMC | IN | 17,463 | 14.73¢ |
| Western Iowa Power Coop | IA | 5,573 | — |
| Westfield Electric Company | WI | 795 | 17.26¢ |
| WestLight Energy | CA | 314,243 | 12.43¢ |
| WGL Energy Services, Inc. | PA | 79,329 | 10.22¢ |
| Wharton County Elec Coop, Inc | TX | 6,738 | 14.18¢ |
| Wheat Belt Public Power Dist | NE | 5,065 | — |
| Wheatland Electric Coop, Inc | KS | 32,395 | 15.01¢ |
| Wheatland Rural Elec Assn, Inc | WY | 4,170 | — |
| Wheeling Power Co | WV | 41,072 | 17.61¢ |
| Whetstone Valley Elec Coop Inc | SD | 3,698 | — |
| White River Electric Assn, Inc | CO | 3,502 | 14.69¢ |
| White River Valley El Coop Inc | MO | 48,644 | 15.47¢ |
| Whitehall Electric Utility | WI | 969 | 12.52¢ |
| Whitewater Valley Rural EMC | IN | 12,241 | 15.39¢ |
| Wild Rice Electric Coop, Inc | MN | 14,862 | 14.70¢ |
| Williamstown Utility Comm | KY | 1,713 | — |
| Willmar Municipal Utilities (MN) | MN | 10,608 | 13.77¢ |
| Willwood Light & Power Company | WY | 78 | — |
| Winner Municipal Utility | SD | 1,861 | — |
| Wiregrass Electric Coop, Inc | AL | 27,549 | 15.97¢ |
| Wisconsin Dells Electric Util | WI | 2,401 | — |
| Wisconsin Electric Power Co | WI | 1,179,163 | 20.53¢ |
| Wisconsin Power & Light Co | WI | 505,706 | 18.47¢ |
| Wisconsin Public Service Corp | WI | 472,199 | 17.20¢ |
| Wisconsin Rapids W W & L Comm | WI | 14,633 | 13.61¢ |
| Wise Electric Coop Inc | TX | 27,360 | 15.33¢ |
| Withheld | TX | 27 | — |
| Withlacoochee River Elec Coop | FL | 255,506 | 13.70¢ |
| Wolverine Alternative Investments, LLC | TX | 1,201 | 12.49¢ |
| Wolverine Power Marketing Coop | MI | 23 | — |
| Wonewoc Electric & Water Util | WI | 439 | — |
| Wood County Electric Coop, Inc | TX | 42,186 | 12.83¢ |
| Woodbury County Rural E C A | IA | 3,468 | — |
| Woodruff Electric Coop Corp | AR | 19,854 | 12.51¢ |
| Wright-Hennepin Coop Elec Assn | MN | 57,130 | 15.00¢ |
| Wyandotte Municipal Serv Comm - (MI) | MI | 12,876 | 16.95¢ |
| Wyrulec Company | NE | 518 | — |