| Public power utility | Retail electric customers |
|---|---|
| Nashville Electric Service | 463,455 |
| City of Memphis | 423,338 |
| Knoxville Utilities Board | 219,297 |
| City of Chattanooga | 200,605 |
| City of Clarksville | 85,314 |
| Johnson City | 84,109 |
| City of Lenoir | 77,358 |
| Sevier County Electric System | 63,506 |
| City of Greeneville | 40,569 |
| City of Dickson | 38,982 |
| City of Jackson | 38,719 |
| Columbia Power System | 36,577 |
| City of Bristol | 34,442 |
| City of Cleveland | 34,348 |
| City of Alcoa Utilities | 32,727 |
| City of Clinton | 31,346 |
| City of Elizabethton | 27,053 |
| City of Gallatin | 26,963 |
| City of Lexington | 23,584 |
| City of Newport | 23,484 |
| City of LaFollette | 23,354 |
| Maryville Utilities | 23,073 |
| City of Paris | 22,824 |
| City of Lawrenceburg | 21,838 |
| Weakley County Mun Elec Sys | 20,893 |
| City of Cookeville | 19,787 |
| City of Fayetteville | 19,465 |
| City of Oak Ridge | 17,831 |
| City of Morristown | 16,509 |
| Carroll County | 15,571 |
| City of Rockwood | 15,435 |
| City of Pulaski | 15,323 |
| Loudon Utilities Board | 14,637 |
| Athens Utility Board | 14,126 |
| City of Dyersburg | 12,075 |
| City of Shelbyville | 11,746 |
| Bolivar Energy Authority | 11,449 |
| City of Dayton | 11,414 |
| City of Harriman | 11,322 |
| Tullahoma Board-Public Utils | 11,295 |
| Benton County | 10,664 |
| City of Sweetwater | 9,870 |
| City of Springfield | 9,144 |
| Town of Erwin | 9,008 |
| City of Milan | 8,534 |
| McMinnville Electric System | 8,307 |
| City of Winchester | 6,835 |
| City of Ripley | 6,663 |
| City of Lewisburg | 6,662 |
| City of Union City | 6,483 |
| City of Brownsville | 5,421 |
| City of Etowah | 5,360 |
| City of Covington | 4,713 |
| City of Humboldt | 4,585 |
| City of Jellico | 4,411 |
| City of Mt Pleasant | 4,294 |
| City of Sparta | 3,092 |
| City of Smithville | 3,051 |
| City of Trenton | 2,463 |
| City of Newbern | 1,836 |
| Tennessee Valley Authority | 64 |
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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