Where fiber is being built in California
As of Dec 31, 2025, FCC filings show fiber at 40.6% of California's 16.3 million homes, and the number of fiber homes grew 9.9% from June 30, 2025.
Fiber was filed in 966 of 1,239 California cities and towns with 250 or more homes. In 416 of them it reached more than half of homes, and in the typical one it reached 41.5%.
Nationally, fiber was filed at 55.8% of homes. FCC Broadband Data Collection, residential units, 25/3 Mbps or faster. Filed by the providers themselves. How this is computed
California counties
Pick a county for its full set of measures, grants and providers. Shares are of residential units, FCC filing as of Dec 31, 2025; growth is from June 30, 2025.
| County | Homes | Fiber share | Cable, no fiber | Fiber home growth |
|---|---|---|---|---|
| Alameda County | 709,337 | 61.3% | at least 37.5% | +2.8% |
| Alpine County | 1,535 | 25.9% | at least 0.1% | +1.3% |
| Amador County | 21,866 | 22.9% | at least 32.2% | +1.5% |
| Butte County | 106,188 | 18.6% | at least 67.2% | +27.7% |
| Calaveras County | 31,258 | 8.4% | at least 59.2% | -0.2% |
| Colusa County | 10,213 | 46.2% | at least 10.3% | +16% |
| Contra Costa County | 466,152 | 40.8% | at least 58.1% | +3.9% |
| Del Norte County | 12,725 | 39.1% | at least 48.3% | +6.6% |
| El Dorado County | 104,525 | 8.4% | at least 65.1% | +14.2% |
| Fresno County | 387,642 | 31.5% | at least 59.1% | +7.6% |
| Glenn County | 13,392 | 0.2% | at least 63% | no change (small June base) |
| Humboldt County | 71,751 | 21.2% | at least 57.6% | +112.8% |
| Imperial County | 65,104 | 8.2% | at least 76.6% | +51.9% |
| Inyo County | 11,015 | 33.9% | at least 41.9% | -0.9% |
| Kern County | 343,057 | 35.2% | at least 55% | +21.7% |
| Kings County | 51,222 | 21.2% | at least 69.1% | +3.5% |
| Lake County | 37,554 | 2.1% | at least 76.3% | +2.1 points (small June base) |
| Lassen County | 13,484 | 51% | at least 9.3% | +18% |
| Los Angeles County | 4.1 million | 44.6% | at least 49.8% | +13.7% |
| Madera County | 58,711 | 17.2% | at least 58.6% | +26.6% |
| Marin County | 126,433 | 38.1% | at least 56.7% | -0.7% |
| Mariposa County | 10,712 | 8.3% | none filed | +1.7% |
| Mendocino County | 48,847 | 1.3% | at least 62.4% | -2.3% |
| Merced County | 102,279 | 22.6% | at least 65.1% | +18.7% |
| Modoc County | 5,730 | 22.5% | at least 9.4% | +6% |
| Mono County | 11,870 | 28.7% | at least 52.1% | +86.4% |
| Monterey County | 162,409 | 23.5% | at least 69% | +11.9% |
| Napa County | 62,220 | 21.7% | at least 68.2% | +12.1% |
| Nevada County | 59,582 | 13.6% | at least 59.8% | +53.9% |
| Orange County | 1.3 million | 38.7% | at least 55.8% | +17.6% |
| Placer County | 203,269 | 39.7% | at least 50.9% | +3.8% |
| Plumas County | 16,287 | 34% | at least 20.6% | +9.2% |
| Riverside County | 963,249 | 54.1% | at least 37.9% | +3.6% |
| Sacramento County | 658,130 | 40.3% | at least 57.3% | +6.9% |
| San Benito County | 24,200 | 23.1% | at least 63.9% | +4.9% |
| San Bernardino County | 832,401 | 52.9% | at least 37.5% | +5% |
| San Diego County | 1.4 million | 34.3% | at least 58.9% | +12.1% |
| San Francisco County | 463,547 | 44% | at least 54.3% | +1.8% |
| San Joaquin County | 287,309 | 32.2% | at least 61.6% | +8.9% |
| San Luis Obispo County | 140,696 | 32.9% | at least 55.1% | +14.8% |
| San Mateo County | 311,937 | 65.8% | at least 33.4% | +4.3% |
| Santa Barbara County | 179,292 | 45% | at least 48.1% | +8.2% |
| Santa Clara County | 772,112 | 39.2% | at least 58.3% | +8.6% |
| Santa Cruz County | 117,379 | 31.3% | at least 64% | +9.1% |
| Shasta County | 91,560 | 7.1% | at least 65.9% | +51.4% |
| Sierra County | 2,425 | 26.7% | at least 1.1% | -3.4% |
| Siskiyou County | 27,273 | 47.8% | at least 21.6% | +10.4% |
| Solano County | 179,903 | 24.6% | at least 72.1% | -6.4% |
| Sonoma County | 235,432 | 22.5% | at least 71.5% | +5.2% |
| Stanislaus County | 206,156 | 21.6% | at least 70% | +17.1% |
| Sutter County | 39,136 | 59.2% | at least 30.2% | +1.6% |
| Tehama County | 30,573 | 1.6% | at least 47.9% | +1.2 points (small June base) |
| Trinity County | 8,986 | 11.7% | none filed | +11.7 points (small June base) |
| Tulare County | 171,673 | 34.6% | at least 52.6% | +17.8% |
| Tuolumne County | 34,093 | 2.7% | at least 67.9% | +2.2 points (small June base) |
| Ventura County | 328,084 | 48.7% | at least 44% | +16.2% |
| Yolo County | 92,989 | 29% | at least 62.8% | +5.9% |
| Yuba County | 34,024 | 23.5% | at least 53.3% | +45.1% |
The 30 largest places in California
By number of homes. Search above for any of the other 1,573 cities and towns.
| City or town | Homes | Fiber share | Cable, no fiber | Fiber home growth |
|---|---|---|---|---|
| Los Angeles | 1.7 million | 37.2% | at least 57.9% | +16.9% |
| San Diego | 621,901 | 40.2% | at least 55% | +11.4% |
| San Francisco | 463,554 | 44% | at least 54.3% | +1.8% |
| San Jose | 371,578 | 37.3% | at least 61.3% | +6.1% |
| Sacramento | 227,858 | 51.5% | at least 47.6% | +6% |
| Fresno | 214,244 | 31.8% | at least 66.5% | +7.4% |
| Oakland | 206,454 | 81.3% | at least 17.7% | no change |
| Long Beach | 193,922 | 68.4% | at least 27.8% | +3.5% |
| Bakersfield | 149,857 | 31% | at least 62.8% | +15.9% |
| Anaheim | 128,948 | 29.4% | at least 64.1% | +14.9% |
| Riverside | 118,465 | 31.8% | at least 61.1% | +15.7% |
| Irvine | 117,438 | 54% | at least 43.3% | +5.4% |
| Stockton | 114,736 | 28.6% | at least 70.4% | +11.3% |
| Chula Vista | 97,675 | 55.2% | at least 41.1% | +4.7% |
| Huntington Beach | 95,473 | 57.2% | at least 36.8% | +3.8% |
| Santa Ana | 95,367 | 38% | at least 52.8% | +10.5% |
| Glendale | 92,254 | 24.5% | at least 70% | +21.9% |
| Fremont | 90,218 | 33.1% | at least 65.9% | +12.6% |
| Modesto | 87,198 | 24.6% | at least 75.1% | +13.6% |
| Santa Clarita | 86,584 | 14.9% | at least 79.2% | +13% |
| Santa Rosa | 83,487 | 32.9% | at least 66.6% | +5.7% |
| San Bernardino | 74,722 | 54% | at least 36.7% | +3.7% |
| Rancho Cucamonga | 73,856 | 21% | at least 71.4% | +23.2% |
| Oceanside | 73,265 | 22.5% | at least 73.5% | +35.3% |
| Pasadena | 72,323 | 32.3% | at least 60.6% | +20.4% |
| Sunnyvale | 72,297 | 35.3% | at least 62.2% | +16.6% |
| Roseville | 70,860 | 49.2% | at least 49.1% | -0.6% |
| Torrance | 65,225 | 53.9% | at least 39% | +19.2% |
| Ontario | 64,836 | 70.1% | at least 22.3% | +2.7% |
| Moreno Valley | 64,678 | 61.4% | at least 35.2% | +5.1% |
The data
Every number on this page traces to one cell in the download. Source: FCC Broadband Data Collection, Fixed Broadband Summary by Geography, filings as of June 30, 2025 and Dec 31, 2025. Census figures: ACS 5-year estimates, 2020 to 2024. Grants: FCC Broadband Funding Map and the state broadband office.
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Figures come from provider filings with the FCC, which providers report themselves and which can be challenged. Nothing on this page is a promise of territory, earnings or service at any address.