Cell phone coverage map for Marin County, CA
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Map data © OpenStreetMap contributors, © CARTO. Rendered with MapLibre. FCC BDC mobile coverage processed by Carrierlytics.
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Cell phone coverage rankings by network in Marin County, CA
Verizon
- Overall
- 81.6%
- 4G LTE
- 81.4% avg. -94 dBm 4G LTE signal where 4G LTE coverage exists: avg. -94 dBm
- 5G
- 39.2% avg. -95 dBm 5G signal where 5G coverage exists: avg. -95 dBm
- Fast 5G
- 26.7% avg. -92 dBm Fast 5G signal where Fast 5G coverage exists: avg. -92 dBm
T-Mobile
- Overall
- 52.2%
- 4G LTE
- 51.4% avg. -95 dBm 4G LTE signal where 4G LTE coverage exists: avg. -95 dBm
- 5G
- 41.4% avg. -89 dBm 5G signal where 5G coverage exists: avg. -89 dBm
- Fast 5G
- 28.7% avg. -85 dBm Fast 5G signal where Fast 5G coverage exists: avg. -85 dBm
AT&T
- Overall
- 70.7%
- 4G LTE
- 70.4% avg. -111 dBm 4G LTE signal where 4G LTE coverage exists: avg. -111 dBm
- 5G
- 54.9% avg. -113 dBm 5G signal where 5G coverage exists: avg. -113 dBm
- Fast 5G
- 29.5% avg. -110 dBm Fast 5G signal where Fast 5G coverage exists: avg. -110 dBm
Coverage varies by neighborhood. Your carrier shouldn’t.
US Mobile lets you switch between all three major networks, so you can choose the one that works best where you actually use your phone.
Pricing, network access, switching terms, and home internet availability may vary.
Coverage by city in Marin County, CA
Cities and towns are shown for county-level comparison. Coverage percentages use land-area only coverage.
| City | Verizon | AT&T | T-Mobile |
|---|---|---|---|
| Alto, CA | 100.0% 100.0% 0.0% 0.0% | 100.0% 100.0% 100.0% 100.0% | 100.0% 100.0% 50.0% 50.0% |
| Belvedere, CA | 100.0% 100.0% 85.7% 42.9% | 100.0% 100.0% 100.0% 50.0% | 92.9% 92.9% 92.9% 92.9% |
| Belvedere Tiburon, CA | 100.0% 100.0% 76.6% 27.8% | 90.5% 89.9% 76.6% 20.9% | 92.4% 92.4% 88.0% 67.1% |
| Black Point-Green Point, CA | 100.0% 100.0% 79.0% 62.9% | 100.0% 100.0% 93.5% 75.8% | 88.7% 88.7% 77.4% 59.7% |
| Bolinas, CA | 88.5% 88.5% 46.8% 28.8% | 86.3% 86.3% 67.6% 63.3% | 15.8% 15.8% 0.0% 0.0% |
| Corte Madera, CA | 100.0% 100.0% 78.7% 57.3% | 98.7% 98.7% 98.7% 65.3% | 94.7% 94.7% 93.3% 80.0% |
| Dillon Beach, CA | 84.0% 84.0% 34.7% 29.3% | 70.7% 70.7% 56.0% 36.0% | 85.3% 85.3% 4.0% 1.3% |
| Fairfax, CA | 100.0% 100.0% 46.0% 22.0% | 100.0% 100.0% 94.0% 62.0% | 88.0% 86.0% 76.0% 62.0% |
| Forest Knolls, CA | 100.0% 100.0% 46.1% 34.2% | 100.0% 100.0% 94.7% 48.7% | 88.2% 76.3% 88.2% 59.2% |
| Greenbrae, CA | 100.0% 100.0% 52.1% 33.6% | 97.5% 97.5% 91.6% 42.9% | 83.2% 83.2% 72.3% 46.2% |
| Inverness, CA | 82.2% 80.3% 30.9% 19.7% | 44.1% 44.1% 30.9% 4.6% | 55.9% 55.9% 17.8% 5.3% |
| Kentfield, CA | 100.0% 100.0% 49.3% 31.0% | 97.2% 97.2% 85.9% 39.4% | 90.1% 90.1% 81.7% 49.3% |
| Lagunitas, CA | 87.9% 86.5% 53.4% 33.2% | 97.8% 97.3% 92.4% 35.9% | 91.5% 87.0% 90.1% 73.1% |
| Lagunitas-Forest Knolls, CA | 91.1% 91.1% 44.6% 33.7% | 99.0% 98.0% 93.1% 48.5% | 88.1% 80.2% 88.1% 62.4% |
| Larkspur, CA | 100.0% 100.0% 86.3% 75.3% | 100.0% 100.0% 94.5% 58.9% | 97.3% 97.3% 93.2% 86.3% |
| Lucas Valley-Marinwood, CA | 100.0% 100.0% 52.2% 36.2% | 80.4% 80.4% 65.9% 40.6% | 91.3% 89.9% 87.0% 67.4% |
| Marin City, CA | 100.0% 100.0% 76.9% 46.2% | 100.0% 100.0% 100.0% 84.6% | 100.0% 92.3% 76.9% 46.2% |
| Marshall, CA | 63.2% 62.8% 22.6% 8.8% | 32.9% 32.7% 20.7% 2.1% | 44.8% 44.8% 10.8% 3.2% |
| Mill Valley, CA | 100.0% 100.0% 61.4% 40.4% | 99.1% 99.1% 91.2% 56.1% | 71.1% 67.5% 55.3% 38.6% |
| Muir Beach, CA | 100.0% 100.0% 25.0% 25.0% | 100.0% 100.0% 58.3% 25.0% | 41.7% 41.7% 33.3% 0.0% |
| Nicasio, CA | 100.0% 100.0% 64.5% 48.4% | 100.0% 100.0% 93.5% 80.6% | 35.5% 32.3% 29.0% 19.4% |
| Novato, CA | 99.7% 99.5% 71.2% 54.3% | 99.4% 99.2% 89.6% 69.1% | 96.0% 95.0% 92.1% 80.3% |
| Olema, CA | 98.3% 98.3% 17.8% 8.5% | 78.8% 78.8% 70.3% 6.8% | 56.8% 56.8% 44.9% 23.7% |
| Point Reyes Station, CA | 81.4% 81.4% 24.4% 24.4% | 54.7% 54.7% 43.0% 16.3% | 86.0% 86.0% 27.9% 11.6% |
| Ross, CA | 100.0% 100.0% 47.2% 33.3% | 100.0% 100.0% 94.4% 33.3% | 91.7% 91.7% 77.8% 55.6% |
| San Anselmo, CA | 100.0% 100.0% 55.4% 40.0% | 98.5% 98.5% 98.5% 52.3% | 96.9% 96.9% 72.3% 29.2% |
| San Geronimo, CA | 100.0% 100.0% 44.4% 27.8% | 100.0% 100.0% 97.2% 63.9% | 72.2% 66.7% 72.2% 41.7% |
| San Quentin, CA | 100.0% 100.0% 81.8% 45.5% | 100.0% 100.0% 90.9% 81.8% | 90.9% 90.9% 81.8% 63.6% |
| San Rafael, CA | 99.7% 99.7% 81.7% 67.2% | 99.7% 99.5% 98.4% 62.3% | 88.6% 88.6% 81.1% 65.9% |
| Santa Venetia, CA | 98.8% 98.8% 78.8% 50.6% | 98.8% 97.6% 81.2% 35.3% | 69.4% 68.2% 62.4% 40.0% |
| Sausalito, CA | 100.0% 100.0% 84.4% 42.2% | 100.0% 100.0% 97.8% 60.0% | 95.6% 93.3% 88.9% 73.3% |
| Sleepy Hollow, CA | 100.0% 100.0% 81.7% 64.8% | 90.1% 88.7% 66.2% 23.9% | 91.5% 91.5% 77.5% 46.5% |
| Stinson Beach, CA | 100.0% 100.0% 66.7% 27.8% | 100.0% 100.0% 72.2% 72.2% | 72.2% 72.2% 0.0% 0.0% |
| Strawberry, CA | 100.0% 100.0% 75.8% 51.5% | 100.0% 100.0% 100.0% 63.6% | 100.0% 97.0% 100.0% 87.9% |
| Tamalpais-Homestead Valley, CA | 100.0% 100.0% 65.1% 50.5% | 75.2% 75.2% 54.1% 34.9% | 76.1% 73.4% 60.6% 38.5% |
| Tiburon, CA | 100.0% 100.0% 78.7% 27.8% | 89.8% 88.9% 75.0% 21.3% | 95.4% 95.4% 91.7% 67.6% |
| Tomales, CA | 100.0% 100.0% 75.0% 62.5% | 87.5% 87.5% 87.5% 75.0% | 25.0% 25.0% 12.5% 0.0% |
| Woodacre, CA | 100.0% 100.0% 33.3% 26.2% | 90.5% 90.5% 64.3% 11.9% | 76.2% 76.2% 76.2% 52.4% |
| Bloomfield, CA | 99.0% 99.0% 77.0% 58.2% | 38.3% 38.3% 10.7% 2.0% | 81.1% 81.1% 80.1% 52.6% |
| Bodega Bay, CA | 99.0% 99.0% 61.0% 45.0% | 97.5% 97.5% 93.5% 74.0% | 97.5% 97.5% 91.5% 85.0% |
| Petaluma Center, CA | 100.0% 100.0% 93.1% 93.1% | 100.0% 100.0% 96.6% 82.8% | 100.0% 100.0% 100.0% 100.0% |
| San Francisco, CA | 99.8% 99.8% 98.9% 92.5% | 99.2% 99.1% 98.3% 68.7% | 99.2% 99.2% 95.9% 90.1% |
| Valley Ford, CA | 100.0% 100.0% 57.4% 54.1% | 54.1% 54.1% 27.9% 1.6% | 95.1% 95.1% 91.8% 80.3% |
About The Coverage Data
Coverage and signal estimates are derived by Carrierlytics from carrier-reported data in the FCC’s National Broadband Coverage Map, last updated in June 2025. “Percent covered” shows how much of the city or ZIP code area has a carrier signal, whether weak or strong. Signal bars show the estimated average signal strength in areas of Marin County, CA where that carrier has coverage.
If a carrier says you should have service but you do not, run a challenge test with the FCC Mobile Speed Test App. The FCC uses those results to check carrier-submitted coverage data and requires a carrier response when enough tests show a pattern of inaccurate coverage reporting.