| Public power utility | Retail electric customers |
|---|---|
| Los Angeles Department of Water & Power | 1,510,995 |
| Sacramento Municipal Util Dist | 666,235 |
| Imperial Irrigation District | 164,802 |
| Modesto Irrigation District | 133,517 |
| City of Anaheim | 123,665 |
| City of Riverside | 113,373 |
| Turlock Irrigation District | 95,746 |
| City of Glendale | 90,990 |
| City of Roseville | 70,475 |
| City of Pasadena | 67,059 |
| City of Santa Clara | 59,389 |
| City of Burbank Water and Power | 53,155 |
| City of Redding | 44,465 |
| Alameda Municipal Power | 37,226 |
| City of Palo Alto | 29,833 |
| City of Lodi | 25,939 |
| City of Colton | 20,064 |
| City of Azusa | 17,583 |
| City of Lompoc | 15,232 |
| Truckee Donner P U D | 14,797 |
| City of Banning | 13,358 |
| Merced Irrigation District | 13,140 |
| Lassen Municipal Utility District | 10,602 |
| City of Moreno Valley | 8,944 |
| City of Ukiah | 7,899 |
| Trinity Public Utilities Dist | 7,291 |
| City of Healdsburg | 6,157 |
| City of Shasta Lake | 4,597 |
| Lathrop Irrigation District | 4,095 |
| Rancho Cucamonga Municipal Utility | 3,592 |
| City of Gridley | 3,180 |
| City of Needles | 3,040 |
| City & County of San Francisco | 2,941 |
| City of Corona | 2,773 |
| City of Vernon | 1,744 |
| DOD USMC Marine Air Ground Combat | 1,514 |
| City of Biggs | 842 |
| Kirkwood Meadows PUD | 757 |
| Shelter Cove Resort Improvement Dist No. 1 | 643 |
| Pittsburg Power Company | 595 |
| City of Cerritos | 261 |
| City of Industry | 136 |
| Port of Oakland | 131 |
| Port of Stockton | 95 |
| City of Victorville | 91 |
| Tuolumne County Pub Power Agny | 33 |
| Eastside Power Authority | 4 |
| City of Escondido | 1 |
| Kings River Conservation Dist | 1 |
| Northern California Power Agny | 1 |
| California Dept. of Water Resources | Not published |
| Intermountain Power Agency | Not published |
| Metropolitan Water District of S CA | Not published |
| MSR Public Power Agency | Not published |
| Nevada Irrigation District | Not published |
| Oakdale&South San Joaquin Irrigation D. | Not published |
| Placer County Water Agency | Not published |
| Power and Water Resources Pooling Authority | Not published |
| South Feather Water and Power Agency | Not published |
| Southern California P P A | Not published |
| Yuba County Water Agency | Not published |
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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