The West here is the Census Bureau's West region: Alaska, Arizona, California, Colorado, Hawaii, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington and Wyoming.
AT&T is the clear outdoor leader in 6 of the 13 states. County by county, Verizon leads in the most (187 of 417).
Every state in the West
In a car, AT&T leads in 9, and 4 have no clear leader.
| State | AT&T | T-Mobile | Verizon | Outdoor leader | In-car leader | |
|---|---|---|---|---|---|---|
| Alaska | 4.2% | No FCC row | 3.1% | Low from all three | Low from all three | View → |
| Arizona | 62.8% | 41.7% | 61.5% | AT&T (Verizon close behind) | AT&T | View → |
| California | 57.3% | 51.4% | 64.3% | Verizon (AT&T close behind) | No clear leader on land (4.8% water) | View → |
| Colorado | 68.6% | 50.7% | 58.1% | AT&T | AT&T | View → |
| Hawaii | 37.1% | 30.7% | 71.9% | No clear leader on land (41.5% water) | No clear leader on land (41.5% water) | View → |
| Idaho | 45% | 40% | 46.2% | Verizon (AT&T close behind) | AT&T | View → |
| Montana | 42.8% | 44.3% | 50.8% | Verizon | AT&T (T-Mobile close behind) | View → |
| Nevada | 52% | 30.5% | 51.5% | AT&T (Verizon close behind) | AT&T (Verizon close behind) | View → |
| New Mexico | 71.2% | 56.8% | 63.6% | AT&T | AT&T | View → |
| Oregon | 54.3% | 37.6% | 59.8% | Verizon (AT&T close behind) | AT&T | View → |
| Utah | 58.7% | 44.6% | 51.9% | AT&T (Verizon close behind) | AT&T | View → |
| Washington | 55.2% | 50.7% | 63.6% | Verizon (AT&T close behind) | No clear leader on land (6.8% water) | View → |
| Wyoming | 53.7% | 43.2% | 45.8% | AT&T | AT&T | View → |
Source: FCC National Broadband Map, carrier filings as of December 31, 2025. Share of area where each carrier reports 4G LTE or 5G to a phone outdoors. Carrier-reported, not measured.
The Mountain states and the Pacific states
The Mountain states (Arizona, Colorado, Idaho, Montana, Nevada, New Mexico, Utah and Wyoming): AT&T leads 125 of 279 counties, 185 run out of coverage, thinnest Idaho County, ID at 16.3%.
The Pacific states (Alaska, California, Hawaii, Oregon and Washington): Verizon leads 82 of 138 counties, 72 run out of coverage, thinnest Wallowa County, OR at 30.7%.
| Division | Counties | AT&T leads | T-Mobile leads | Verizon leads | Runs out | Thinnest county |
|---|---|---|---|---|---|---|
| The Mountain states | 279 | 125 | 9 | 105 | 185 | Idaho County, ID |
| The Pacific states | 138 | 23 | 1 | 82 | 72 | Wallowa County, OR |
County by county
417 counties where all three carriers file; in 257 even the best carrier leaves 25%+ of the land uncovered.
| Carrier | Counties led, outdoors | Counties led, in a car |
|---|---|---|
| Verizon | 187 | 36 |
| AT&T | 148 | 289 |
| T-Mobile | 10 | 13 |
| No clear leader | 72 | 79 |
The least-covered counties in the West
The three thinnest in each Census division, by share of land with 4G from any carrier; counties a fifth or more water are left out.
| County | 4G, any carrier | AT&T | T-Mobile | Verizon | Leader |
|---|---|---|---|---|---|
| Idaho County, ID | 16.3% | 11.2% | 9.2% | 13.2% | Low from all three |
| Clearwater County, ID | 20.1% | 7.5% | 13.1% | 10.9% | Low from all three |
| Lincoln County, MT | 21.2% | 16.5% | 15.1% | 14.2% | Low from all three |
| Wallowa County, OR | 30.7% | 24% | 16.2% | 22.1% | AT&T (Verizon close behind) |
| Skamania County, WA | 31.1% | 22.2% | 15.4% | 13.9% | AT&T |
| Trinity County, CA | 35.7% | 8.8% | 6.2% | 34.4% | Verizon |
5G across the West
5G at 35/3 Mbps, any carrier: California 47.7%, Alaska 0.9%, the US 39.4%.
| State | 5G 7/1 Mbps | 5G 35/3 Mbps | 4G LTE, any carrier | |
|---|---|---|---|---|
| Alaska | 1.8% | 0.9% | 8.6% | View → |
| Arizona | 43.3% | 33.4% | 73.1% | View → |
| California | 56.2% | 47.7% | 72.2% | View → |
| Colorado | 50.6% | 37.7% | 76.2% | View → |
| Hawaii | 48.3% | 34.4% | 75.4% | View → |
| Idaho | 41.4% | 33.4% | 55.6% | View → |
| Montana | 40.5% | 30.7% | 65.9% | View → |
| Nevada | 38.5% | 29% | 63.6% | View → |
| New Mexico | 55.8% | 42.1% | 80.5% | View → |
| Oregon | 34.6% | 25.3% | 68.9% | View → |
| Utah | 49.3% | 38.5% | 69.8% | View → |
| Washington | 51.3% | 41.9% | 72.4% | View → |
| Wyoming | 37.9% | 26.4% | 77.7% | View → |