# List of U.S. Routes in Washington

The U.S. Routes in Washington are segments of the United States Numbered Highway System that are owned and maintained by the U.S. state of Washington through the Washington State Department of Transportation (WSDOT). The United States Numbered Highway System in Washington covers 1,870 miles (3,009.5 km) and consists of eight highways, divided into four primary routes and four auxiliary routes.
The United States Numbered Highway System was approved and established on November 11, 1926 by the American Association of State Highway Officials (AASHO) and included eleven routes traveling through Washington.
In 1961, the state introduced a set of route markers in Olympia that were colored based on destination and direction rather than route.

## Mainline routes

| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
| US 2 | 326.34 | 525.19 | SR 529 in Everett | US 2 in Newport | 01946-01-011946 | current | |
| US 10 | 306.77 | 493.70 | US 99 in Seattle | US 10 at State Line | 01926-01-011926 | 01969-01-011969 | Replaced by I-90 and SR 10 |
| US 12 | 430.52 | 692.85 | US 101 in Aberdeen | US 12 in Clarkston | 01967-01-011967 | current | Longest U.S. route in Washington |
| US 95 | 0.87 | 1.40 | US 95 near Uniontown | US 95 near Uniontown | 01926-01-011926 | 01979-01-011979 | Rerouted to bypass Washington; now US 195 |
| US 97 | 321.60 | 517.57 | US 97 at Maryhill | BC 97 near Oroville | 01926-01-011926 | current | |
| US 99 | 275.25 | 442.97 | US 99 in Vancouver | BC 99 in Blaine | 01926-01-011926 | 01969-01-011969 | Replaced by I-5 and SR 99 |
| US 101 | 365.56 | 588.31 | US 101 at Megler | I-5 in Tumwater | 01926-01-011926 | current | |
| US 195 | 93.37 | 150.26 | US 195 near Uniontown | I-90/US 2/US 395 in Spokane | 01926-01-011926 | current | |
| US 197 | 2.76 | 4.44 | US 197 near Dallesport | SR 14 near Dallesport | 01952-01-01c. 1952 | current | Shortest U.S. route in Washington |
| US 295 | 44.34 | 71.36 | US 410 near Pomeroy | US 195 in Colfax | 01926-01-011926 | 01968-01-01c. 1968 | Replaced by SR 127 and SR 26 |
| US 395 | 275.00 | 442.57 | US 395 near Plymouth | BC 395 at Laurier | 01926-01-011926 | current | |
| US 410 | 442.63 | 712.34 | US 101 in Aberdeen | US 410 in Clarkston | 01926-01-011926 | 01967-01-011967 | Replaced by US 12, I-5, and SR 410 |
| US 730 | 6.08 | 9.78 | US 730 near Wallula | US 12 near Wallula | 01926-01-011926 | current | |
| US 830 | 204.51 | 329.13 | US 101 at Johnston's Landing | US 97 near Maryhill | 01926-01-011926 | 01968-01-01c. 1968 | Replaced by SR 4, I-5, and SR 14 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi ||||||||

## Special routes

| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
| US 10 Alt. | — | — | US 10/US 99 in Seattle | US 10 Alt. in Newport | 01940-01-01c. 1940 | 01946-01-011946 | Replaced by US 2 |
| US 10 Alt. | — | — | US 10 in Seattle | US 10 in Issaquah | 01940-01-011940 | 01955-01-011955 | Replaced by SR 900 |
| US 97 Alt. | 39.95 | 64.29 | US 97/US 2 in Sunnyslope | US 97 near Chelan | 01987-01-011987 | current | Longest special U.S. route in Washington, serves Entiat and Chelan |
| US 97 Alt. | — | — | US 97/SSH 3A in Toppenish | US 97 in Union Gap | 01955-01-011955 | 01973-01-011973 | Replaced by US 97 |
| US 97 Spur | 0.26 | 0.42 | US 97 near Orondo | US 2 near Orondo | — | — | Shortest special U.S. route in Washington |
| US 97 Bus. | — | — | US 97 near Okanogan | US 97/SR 20 near Omak | 01967-01-01c. 1967 | 01973-01-01c. 1973 | Replaced by SR 215 |
| US 99 Alt. | — | — | US 99 in Bellingham | BC 13 near Lynden | 01954-01-01c. 1954 | 01969-01-011969 | Replaced by SR 539 |
| US 99 Alt. | — | — | US 99 in Burlington | US 99 in Bellingham | 01937-01-01c. 1937 | 01968-01-01c. 1968 | Replaced by SR 11 |
| US 99T | — | — | I-5 in Tukwila | US 99 in Tuwkila | 01957-01-01c. 1957 | 01964-01-01c. 1964 | Replaced by SR 599 |
| US 101 Alt. | 0.63 | 1.01 | US 101 near Ilwaco | US 101 near Ilwaco | 01970-01-011970 | current | Recognized by AASHTO in 2006, bypasses Ilwaco and Seaview |
| US 101 Truck | — | — | US 101 in Port Angeles | US 101 in Port Angeles | 01966-01-01c. 1966 | 01991-01-01c. 1991 | Replaced by SR 117 |
| US 195 Spur | 0.54 | 0.87 | US 195 near Uniontown | US 195 Spur near Uniontown | 01979-01-011979 | current | Previously part of US 95 |
| US 395 Spur | 6.99 | 11.25 | Freya Street near Spokane | US 395 near Mead | proposed | — | Named the North Spokane Corridor freeway, bypasses Spokane |
| US 730 Spur | 0.30 | 0.48 | US 730 near Wallula | US 12 near Wallula | — | — | |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi ||||||||