Carrierlytics State Coverage Guide

Washington Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Washington.

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



Cell phone coverage map for Washington

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 Washington

#1

T-Mobile

Coverage Score 57.3
In Washington
Overall
52.6%
4G LTE
52.6% avg. -94 dBm 4G LTE signal where 4G LTE coverage exists: avg. -94 dBm
5G
42.8% avg. -90 dBm 5G signal where 5G coverage exists: avg. -90 dBm
Fast 5G
31.5% avg. -86 dBm Fast 5G signal where Fast 5G coverage exists: avg. -86 dBm
#2

Verizon

Coverage Score 46.4
In Washington
Overall
60.6%
4G LTE
60.5% avg. -97 dBm 4G LTE signal where 4G LTE coverage exists: avg. -97 dBm
5G
14.1% avg. -95 dBm 5G signal where 5G coverage exists: avg. -95 dBm
Fast 5G
9.2% avg. -91 dBm Fast 5G signal where Fast 5G coverage exists: avg. -91 dBm
#3

AT&T

Coverage Score 42.8
In Washington
Overall
58.7%
4G LTE
58.6% avg. -108 dBm 4G LTE signal where 4G LTE coverage exists: avg. -108 dBm
5G
35.5% avg. -112 dBm 5G signal where 5G coverage exists: avg. -112 dBm
Fast 5G
23.4% avg. -111 dBm Fast 5G signal where Fast 5G coverage exists: avg. -111 dBm
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Coverage by county in Washington

Counties are shown for statewide comparison. Coverage percentages use land-area only coverage.

County Verizon AT&T T-Mobile
Adams County, WA 86.0% 86.0% 20.0% 11.8% 90.8% 90.8% 59.2% 44.7% 86.2% 86.2% 72.3% 56.8%
Asotin County, WA 48.3% 48.3% 4.1% 2.1% 42.7% 41.9% 27.9% 11.5% 41.3% 41.3% 28.3% 17.9%
Benton County, WA 97.5% 97.5% 29.4% 16.3% 95.3% 95.1% 71.5% 43.0% 95.2% 95.2% 87.1% 74.6%
Chelan County, WA 35.3% 35.3% 6.4% 3.7% 31.9% 31.7% 13.9% 8.4% 28.6% 28.4% 20.9% 14.9%
Clallam County, WA 68.4% 68.4% 3.9% 2.2% 47.3% 47.1% 26.4% 18.6% 27.8% 27.5% 24.5% 15.4%
Clark County, WA 87.3% 87.3% 55.1% 42.5% 84.2% 84.2% 62.1% 41.0% 73.7% 73.7% 65.4% 52.0%
Columbia County, WA 54.9% 54.9% 6.5% 3.4% 45.0% 45.0% 0.0% 0.0% 29.5% 29.5% 20.7% 12.3%
Cowlitz County, WA 31.0% 31.0% 8.4% 5.7% 44.6% 44.5% 18.6% 10.5% 29.5% 29.4% 24.0% 16.9%
Douglas County, WA 80.3% 80.3% 16.2% 7.7% 87.5% 87.5% 50.8% 42.1% 82.4% 82.4% 60.3% 33.6%
Ferry County, WA 24.4% 24.4% 0.1% 0.0% 44.1% 44.1% 22.5% 20.1% 31.4% 31.4% 21.7% 13.7%
Franklin County, WA 81.7% 81.7% 30.9% 19.5% 76.7% 76.5% 57.1% 39.9% 86.6% 86.6% 72.3% 59.8%
Garfield County, WA 59.1% 59.1% 0.0% 0.0% 55.3% 54.8% 10.1% 3.8% 49.3% 49.3% 33.0% 19.9%
Grant County, WA 91.4% 91.3% 30.5% 15.2% 94.5% 93.9% 82.7% 48.9% 91.2% 91.2% 76.8% 61.3%
Grays Harbor County, WA 71.6% 71.6% 5.6% 3.3% 56.8% 56.7% 4.4% 3.6% 53.6% 53.6% 37.0% 22.9%
Island, WA County 97.9% 97.9% 38.2% 20.8% 92.0% 91.9% 58.3% 33.9% 88.3% 88.3% 79.7% 65.0%
Jefferson County, WA 47.3% 47.1% 4.4% 1.9% 31.6% 31.6% 17.4% 13.3% 22.1% 22.0% 17.4% 10.0%
King County, WA 75.5% 75.4% 43.6% 38.2% 56.3% 56.3% 39.7% 27.0% 54.8% 54.8% 49.7% 40.8%
Kitsap County, WA 98.0% 97.9% 70.3% 51.9% 93.6% 93.5% 60.7% 41.4% 85.9% 85.9% 76.2% 54.4%
Kittitas County, WA 68.2% 68.2% 9.9% 3.8% 65.4% 65.2% 42.9% 17.7% 55.8% 55.7% 47.6% 38.2%
Klickitat County, WA 59.7% 59.6% 6.7% 3.4% 65.7% 65.5% 41.5% 28.3% 56.4% 56.4% 41.0% 27.0%
Lewis County, WA 49.5% 49.5% 4.3% 2.3% 40.5% 40.3% 18.6% 13.9% 43.5% 43.4% 33.9% 22.8%
Lincoln County, WA 87.0% 87.0% 5.9% 2.9% 87.0% 87.0% 58.2% 40.6% 90.2% 90.2% 76.0% 53.2%
Mason County, WA 76.2% 76.2% 5.4% 2.8% 49.7% 49.7% 10.6% 9.0% 55.6% 55.6% 42.8% 27.2%
Okanogan County, WA 32.5% 32.5% 2.4% 1.2% 40.8% 40.8% 22.5% 18.8% 36.3% 36.3% 25.1% 18.2%
Pacific County, WA 47.6% 47.6% 2.1% 1.3% 51.9% 51.8% 28.5% 22.7% 42.7% 42.5% 32.4% 19.3%
Pend Oreille County, WA 47.2% 47.2% 0.7% 0.3% 49.0% 49.0% 34.6% 28.3% 37.7% 37.6% 32.1% 22.1%
Pierce County, WA 71.3% 71.2% 40.1% 32.0% 62.3% 62.2% 42.1% 28.9% 57.0% 56.9% 49.5% 37.2%
San Juan County, WA 74.2% 74.2% 0.6% 0.4% 54.1% 54.0% 14.1% 9.6% 89.1% 88.7% 67.6% 48.5%
Skagit County, WA 61.1% 61.1% 11.6% 6.5% 46.7% 46.5% 28.3% 17.0% 35.5% 35.4% 31.7% 23.2%
Skamania County, WA 12.7% 12.7% 1.8% 0.5% 21.5% 21.3% 10.7% 6.6% 11.7% 11.7% 8.3% 5.2%
Snohomish County, WA 54.4% 54.3% 22.9% 17.9% 49.9% 49.9% 35.8% 23.0% 40.2% 40.2% 35.3% 27.7%
Spokane County, WA 94.1% 93.9% 61.5% 48.5% 92.4% 92.3% 77.8% 43.8% 87.2% 87.0% 82.4% 66.4%
Stevens County, WA 68.0% 68.0% 5.0% 2.8% 66.2% 66.1% 44.8% 32.2% 51.5% 51.4% 41.0% 27.0%
Thurston County, WA 84.2% 84.1% 27.9% 20.7% 74.6% 74.6% 45.9% 36.3% 70.5% 70.5% 54.7% 39.5%
Wahkiakum County, WA 62.7% 62.7% 0.2% 0.0% 46.4% 46.4% 16.2% 8.5% 24.6% 24.6% 19.7% 13.0%
Walla Walla County, WA 72.9% 72.9% 10.1% 6.2% 64.5% 64.5% 15.5% 8.9% 64.3% 64.2% 48.3% 35.0%
Whatcom County, WA 38.5% 38.5% 5.9% 3.3% 35.2% 35.2% 27.5% 19.9% 29.5% 29.3% 26.3% 20.8%
Whitman County, WA 76.2% 76.2% 8.1% 4.4% 72.1% 72.0% 21.9% 15.2% 69.3% 69.3% 52.4% 34.8%
Yakima County, WA 51.0% 51.0% 17.7% 11.3% 59.8% 59.8% 42.1% 19.5% 50.0% 50.0% 43.1% 36.4%

About The Coverage Data

Coverage and signal estimates are derived by Compare Wireless Carriers 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 Washington 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.