| Public power utility | Retail electric customers |
|---|---|
| Sun Prairie Utilities | 18,498 |
| Manitowoc Public Utilities | 18,228 |
| City of Kaukauna | 16,612 |
| Wisconsin Rapids W W & L Comm | 14,568 |
| City of Marshfield | 13,966 |
| Oconomowoc Utilities | 11,376 |
| City of Sturgeon Bay | 9,629 |
| City of Menasha | 9,469 |
| City of Stoughton | 9,443 |
| City of Plymouth | 8,768 |
| Hartford Electric | 7,971 |
| Village of Waunakee | 7,536 |
| City of River Falls | 7,504 |
| Cedarburg Light & Water Comm | 7,012 |
| Two Rivers Water & Light | 6,238 |
| Shawano Municipal Utilities | 6,104 |
| Rice Lake Utilities | 6,076 |
| City of New Richmond | 5,705 |
| Reedsburg Utility Comm | 5,564 |
| City of Sheboygan Falls | 5,121 |
| City of Elkhorn | 5,045 |
| Lake Mills Light & Water | 4,580 |
| Waupun Utilities | 4,543 |
| City of Evansville | 4,467 |
| Jefferson Utilities | 4,333 |
| Village of Mt. Horeb | 4,286 |
| New London Electric&Water Util | 4,142 |
| City of Medford | 3,964 |
| Slinger Utilities | 3,037 |
| City of Richland Center | 2,939 |
| City of Columbus | 2,906 |
| City of Black River Falls | 2,886 |
| City of Clintonville | 2,852 |
| City of Kiel | 2,831 |
| City of New Holstein | 2,716 |
| Wisconsin Dells Electric Util | 2,327 |
| Village of Prairie Du Sac | 2,227 |
| Bloomer Electric & Water Co | 2,185 |
| Algoma Utility Comm | 2,050 |
| Village of Bangor | 1,998 |
| Village of Sauk City | 1,955 |
| Waterloo Light & Water Comm | 1,926 |
| City of Spooner | 1,868 |
| City of Barron | 1,860 |
| Brodhead Water & Lighting Comm | 1,857 |
| City of Lodi | 1,801 |
| City of Boscobel | 1,782 |
| City of Arcadia | 1,718 |
| Oconto Falls Water & Light Comm | 1,674 |
| Florence Utility Comm | 1,621 |
| Hustisford Utilities | 1,597 |
| City of Eagle River | 1,587 |
| Village of Trempealeau | 1,483 |
| City of Cumberland | 1,452 |
| City of Fennimore | 1,424 |
| Village of Pardeeville | 1,398 |
| Village of Black Earth | 1,376 |
| Village of New Glarus | 1,296 |
| City of Westby | 1,275 |
| Village of Gresham | 1,242 |
| Juneau Utility Comm | 1,166 |
| Village of Muscoda | 1,138 |
| City of Cuba City | 1,132 |
| City of New Lisbon | 1,079 |
| Village of Mazomanie | 986 |
| Whitehall Electric Utility | 963 |
| Village of Stratford | 887 |
| City of Cornell | 868 |
| City of Princeton | 853 |
| Village of Cadott | 842 |
| City of Elroy | 829 |
| City of Shullsburg | 762 |
| Village of Cashton | 648 |
| Village of Hazel Green | 644 |
| Village of Belmont | 586 |
| La Farge Municipal Electric Co | 526 |
| City of Argyle | 515 |
| Village of Viola | 468 |
| Wonewoc Electric & Water Util | 466 |
| Village of Benton | 463 |
| Village of Merrillan | 417 |
Largest first by retail electric customers, as each employer reports it to its federal registry.
Source: U.S. Energy Information Administration, Annual Electric Power Industry Report (Form EIA-861), 2024 final data. Data captured October 2, 2026.
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