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California Internet Speeds by County (2024)
Measured internet performance across all 55 counties in California with enough speed tests to report. The state median download in 2024 was 83.3 Mbps, against a US median of 85.2 Mbps.
Counties covered
55
Fastest county
Marin
Fastest median
116.6 Mbps
Slowest median
13.0 Mbps
Every county ranked by measured download speed
| # | County | Down | Up | ms | Tests |
|---|---|---|---|---|---|
| 1 | Marin | 116.6 | 18.2 | 10.2 | 35,109 |
| 2 | Ventura | 115.5 | 19.7 | 9.6 | 72,201 |
| 3 | San Mateo | 106.9 | 23.0 | 8.0 | 112,633 |
| 4 | Sonoma | 104.9 | 20.6 | 10.5 | 48,708 |
| 5 | Orange | 99.5 | 17.6 | 8.6 | 423,245 |
| 6 | San Diego | 98.7 | 19.0 | 11.4 | 320,385 |
| 7 | Kern | 98.6 | 11.7 | 12.4 | 45,649 |
| 8 | Solano | 96.1 | 19.4 | 11.5 | 32,745 |
| 9 | Santa Cruz | 94.2 | 16.3 | 11.6 | 27,651 |
| 10 | Imperial | 93.8 | 11.1 | 13.6 | 6,379 |
| 11 | Santa Barbara | 93.1 | 21.6 | 11.5 | 34,535 |
| 12 | Monterey | 91.6 | 17.1 | 10.9 | 25,959 |
| 13 | Butte | 91.1 | 15.6 | 18.3 | 13,992 |
| 14 | Kings | 90.8 | 16.0 | 18.5 | 6,885 |
| 15 | San Luis Obispo | 90.7 | 11.0 | 14.2 | 24,165 |
| 16 | Riverside | 89.5 | 15.5 | 12.8 | 237,461 |
| 17 | Tulare | 88.9 | 15.4 | 18.5 | 29,985 |
| 18 | Contra Costa | 88.5 | 17.4 | 10.7 | 145,700 |
| 19 | Santa Clara | 88.4 | 16.6 | 8.4 | 417,780 |
| 20 | Sutter | 88.0 | 17.5 | 13.8 | 8,489 |
| 21 | Humboldt | 87.6 | 17.6 | 15.3 | 8,225 |
| 22 | Los Angeles | 84.7 | 11.5 | 10.2 | 1,436,652 |
| 23 | Shasta | 84.5 | 10.5 | 23.3 | 11,843 |
| 24 | San Bernardino | 84.0 | 12.7 | 11.7 | 204,272 |
| 25 | Merced | 79.6 | 15.6 | 16.2 | 14,194 |
| 26 | Napa | 79.6 | 17.6 | 10.9 | 12,733 |
| 27 | Nevada | 79.4 | 11.8 | 13.4 | 10,567 |
| 28 | Yolo | 78.8 | 11.8 | 12.9 | 18,861 |
| 29 | Fresno | 78.2 | 13.7 | 17.4 | 120,336 |
| 30 | Placer | 76.8 | 12.0 | 13.1 | 49,251 |
| 31 | Yuba | 76.4 | 11.9 | 16.1 | 4,172 |
| 32 | Del Norte | 76.2 | 10.7 | 30.0 | 1,145 |
| 33 | San Joaquin | 75.6 | 13.6 | 18.5 | 74,701 |
| 34 | El Dorado | 73.5 | 11.2 | 18.2 | 19,009 |
| 35 | San Benito | 73.0 | 11.3 | 15.5 | 3,731 |
| 36 | Lake | 69.1 | 24.2 | 10.0 | 4,618 |
| 37 | Stanislaus | 68.5 | 11.8 | 18.9 | 35,720 |
| 38 | Alameda | 68.4 | 16.2 | 10.0 | 508,340 |
| 39 | Siskiyou | 61.8 | 12.4 | 41.8 | 3,447 |
| 40 | San Francisco | 59.7 | 11.9 | 11.4 | 262,411 |
| 41 | Mono | 57.8 | 9.9 | 17.8 | 3,482 |
| 42 | Sacramento | 56.4 | 11.5 | 18.6 | 249,927 |
| 43 | Calaveras | 54.7 | 9.2 | 16.8 | 4,088 |
| 44 | Madera | 53.3 | 11.5 | 19.9 | 6,753 |
| 45 | Tuolumne | 51.4 | 9.6 | 16.6 | 6,859 |
| 46 | Mendocino | 47.2 | 10.1 | 14.9 | 6,301 |
| 47 | Plumas | 45.2 | 8.0 | 12.5 | 1,733 |
| 48 | Glenn | 42.5 | 10.4 | 12.9 | 848 |
| 49 | Inyo | 39.9 | 4.9 | 16 | 335 |
| 50 | Colusa | 39.7 | 11.3 | 19.8 | 1,385 |
| 51 | Tehama | 32.4 | 9.0 | 24.7 | 2,496 |
| 52 | Lassen | 27.4 | 4.9 | 29.2 | 1,308 |
| 53 | Amador | 24.4 | 5.4 | 21.0 | 2,946 |
| 54 | Trinity | 14.6 | 2.5 | 19.8 | 584 |
| 55 | Mariposa | 13.0 | 2.0 | 49.3 | 1,296 |
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