Carrierlytics County Coverage Guide

Mendocino County, CA Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Mendocino County, CA.

Using FCC mobile coverage data across cities and ZIP codes in Mendocino County, CA, Carrierlytics compares the top-performing networks and the cheapest plans that use them.

Mendocino County, CA

Cell phone coverage map for Mendocino County, CA

Zoom in for local detail. Tap or click a colored area to see coverage and signal details. On mobile, use two fingers to move the map.

Coverage Key
Less covered More covered
Darker areas mean the carrier covers more of that location.

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 Mendocino County, CA

#1

T-Mobile

Coverage Score 37.3
In Mendocino County, CA
Overall
23.5%
4G LTE
23.0% avg. -95 dBm 4G LTE signal where 4G LTE coverage exists: avg. -95 dBm
5G
16.8% avg. -88 dBm 5G signal where 5G coverage exists: avg. -88 dBm
Fast 5G
12.3% avg. -84 dBm Fast 5G signal where Fast 5G coverage exists: avg. -84 dBm
#2

Verizon

Coverage Score 33.0
In Mendocino County, CA
Overall
35.2%
4G LTE
35.1% avg. -99 dBm 4G LTE signal where 4G LTE coverage exists: avg. -99 dBm
5G
4.7% avg. -96 dBm 5G signal where 5G coverage exists: avg. -96 dBm
Fast 5G
3.0% avg. -93 dBm Fast 5G signal where Fast 5G coverage exists: avg. -93 dBm
#3

AT&T

Coverage Score 20.6
In Mendocino County, CA
Overall
30.0%
4G LTE
30.0% avg. -113 dBm 4G LTE signal where 4G LTE coverage exists: avg. -113 dBm
5G
9.4% avg. -116 dBm 5G signal where 5G coverage exists: avg. -116 dBm
Fast 5G
5.9% avg. -115 dBm Fast 5G signal where Fast 5G coverage exists: avg. -115 dBm
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Coverage by city in Mendocino County, CA

Cities and towns are shown for county-level comparison. Coverage percentages use land-area only coverage.

City Verizon AT&T T-Mobile
Albion, CA 95.1% 95.1% 0.0% 0.0% 92.7% 92.7% 41.5% 41.5% N/A N/A N/A N/A
Anchor Bay, CA 91.6% 91.6% 0.0% 0.0% 80.7% 80.7% 16.9% 6.0% 1.2% 1.2% 1.2% 0.0%
Boonville, CA 100.0% 100.0% 3.7% 3.0% 91.1% 91.1% 60.7% 60.7% 91.1% 91.1% 88.1% 74.8%
Branscomb, CA 25.9% 25.9% 0.0% 0.0% 10.2% 10.2% 0.0% 0.0% 16.4% 16.4% 1.4% 0.0%
Brooktrails, CA 95.4% 95.4% 19.7% 8.1% 87.9% 87.9% 30.1% 11.0% 74.6% 68.8% 71.7% 41.0%
Calpella, CA 100.0% 100.0% 74.6% 61.0% 89.8% 89.8% 62.7% 18.6% 100.0% 100.0% 98.3% 89.8%
Caspar, CA 43.2% 43.2% 0.0% 0.0% 81.1% 81.1% 1.4% 1.4% 5.4% 1.4% 5.4% 0.0%
Cleone, CA 100.0% 100.0% 2.6% 2.6% 97.4% 97.4% 76.3% 76.3% 86.8% 86.8% 76.3% 15.8%
Comptche, CA N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Covelo, CA N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Dos Rios, CA 19.4% 19.4% 0.0% 0.0% 9.3% 9.3% 0.0% 0.0% 6.2% 6.2% 0.0% 0.0%
Elk, CA 26.1% 26.1% 3.0% 1.2% 22.8% 22.8% 3.1% 2.6% 4.3% 4.0% 3.6% 0.7%
Fort Bragg, CA 100.0% 100.0% 23.9% 19.7% 97.2% 97.2% 84.5% 66.2% 91.5% 91.5% 91.5% 91.5%
Gualala, CA 26.8% 26.8% 0.0% 0.0% 29.5% 29.5% 4.7% 3.6% 4.2% 4.0% 3.0% 1.1%
Hopland, CA 95.3% 95.3% 0.0% 0.0% 98.8% 98.8% 77.9% 66.3% 98.8% 98.8% 98.8% 86.0%
Laytonville, CA 95.6% 95.6% 0.0% 0.0% 97.0% 97.0% 0.0% 0.0% 97.8% 97.8% 0.0% 0.0%
Leggett, CA 21.9% 21.9% 0.0% 0.0% 12.5% 12.5% 0.0% 0.0% 75.0% 75.0% 71.9% 48.4%
Little River, CA 97.7% 97.7% 0.0% 0.0% 25.0% 25.0% 4.5% 4.5% N/A N/A N/A N/A
Manchester, CA N/A N/A N/A N/A 83.9% 83.9% 61.3% 61.3% 91.9% 91.9% 88.7% 77.4%
Mendocino, CA 100.0% 100.0% 0.0% 0.0% 44.6% 44.6% 19.6% 17.9% 57.1% 57.1% 0.0% 0.0%
Navarro, CA 16.3% 16.3% 0.0% 0.0% 26.4% 26.4% 10.1% 10.1% 2.2% 2.2% 1.7% 0.6%
Philo, CA 100.0% 100.0% 45.8% 39.6% 100.0% 100.0% 27.1% 25.0% 100.0% 97.9% 100.0% 87.5%
Piercy, CA 49.4% 49.4% 0.0% 0.0% 7.0% 7.0% 0.0% 0.0% 2.6% 2.6% 0.0% 0.0%
Point Arena, CA N/A N/A N/A N/A 86.1% 86.1% 44.4% 0.0% 88.9% 88.9% 86.1% 66.7%
Potter Valley, CA 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 100.0% 68.7% 100.0% 100.0% 100.0% 100.0%
Redwood Valley, CA 100.0% 100.0% 62.9% 50.0% 97.1% 97.1% 92.9% 60.0% 100.0% 100.0% 100.0% 94.3%
Talmage, CA 100.0% 100.0% 94.9% 89.7% 100.0% 100.0% 100.0% 15.4% 100.0% 100.0% 100.0% 94.9%
Ukiah, CA 100.0% 100.0% 87.9% 77.1% 98.6% 98.6% 96.4% 61.4% 97.9% 97.9% 96.4% 87.9%
Westport, CA 10.3% 10.3% 0.0% 0.0% 3.4% 3.4% 0.0% 0.0% 7.3% 7.2% 5.2% 2.4%
Willits, CA 100.0% 100.0% 84.8% 69.7% 100.0% 100.0% 83.3% 54.5% 98.5% 97.0% 98.5% 92.4%
Yorkville, CA 42.8% 42.7% 0.2% 0.0% 20.6% 20.6% 5.1% 5.0% 10.8% 10.5% 10.0% 6.0%
Sea Ranch, CA 83.0% 83.0% 0.0% 0.0% 71.2% 71.2% 8.1% 6.1% N/A N/A N/A N/A

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 Mendocino 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.