Best cell phone coverage in Washington Washington, statewide
Verizon reports the widest coverage in Washington: 63.6% of the area outdoors, 12.9 points ahead of T-Mobile. The lead is bigger than the 6.8% of Washington that is water, so it holds on land. AT&T is close enough behind to call the top two level.
Carrier-reported coverage from FCC carrier filings as of December 31, 2025, not measured signal. How these figures are read
Coverage in Washington
What stands out in Washington
- In 20 of Washington's 39 counties even the best carrier leaves a quarter or more of the land uncovered; the thinnest is Skamania County, WA.
- Verizon loses the most of Washington in a moving car: 63.6% outdoors, 27% in a car.
- T-Mobile reports 50.7% of Washington outdoors, against 47.3% of the US.
- 5G at 35/3 Mbps covers 41.9% of Washington, against 39.4% of the US.
AT&T vs T-Mobile vs Verizon in Washington
4G and 5G across all carriers in Washington
Check your street on each carrier's map
Where coverage runs thin in Washington
Counties with the least land under 4G LTE from any carrier: Skamania County (31.1%), Chelan County (41.1%), Okanogan County (47.6%), Whatcom County (48.9%), Ferry County (53.6%). See how Washington compares in the 10 US states with the least cell coverage.
Would a signal booster help here?
Only sometimes. A booster amplifies a signal that already reaches your roof, window or car; it cannot create coverage. If a phone held outdoors in Washington shows no bars, it has nothing to amplify. It helps where a usable outdoor signal dies indoors. Check that outdoor signal first, and match the booster to your carrier's bands, not to a headline range figure.
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