US Highways Route - US91
| Route | From | To | Miles | States passed through | Replaced by | Notes |
| US 91 | (Sweetgrass, MT *) Idaho Falls, ID | Brigham City, UT (Long Beach, CA) | 163 (1468) | (MT) ID UT (AZ) (NV) (CA) | I-15 US 89 I-15 UT-28 UT-78 I-15 UT-133 I-15 NV-170 I-15 NV-604 I-15 I-215 CA-91 | Since 1926; N exten 1933; N trunc 1980; S exten Barstow, CA 1938; Long Beach, CA 1947; S trunc Barstow, CA 1965; Jean, NV 1973; Curr 1974 |
| US 191 [I] | Loring, MT * | Yellowstone NP, MT (Brigham City, UT) | 440 (657) | MT WY MT (ID) (UT) | US 20 US 26 US 91 I-15 UT-13 UT-83 | Since 1926; N Leg; S trunc Tremonton, UT 1962; idaho Falls, ID 1972; Curr S trunc 1981; N exten Bozeman, MT 1934; N exten Malta, MT 1963; Curr N exten 1997 |
| US 191 [II] | Yellowstone NP, WY | Douglas, AZ * | 1465 | WY UT AZ | Nill | S Leg; Since 1982; Orig end Chambers, AZ; S exten 1992 |
| US 491 | Monticello, UT | Gallup, NM | 194 | UT CO NM | Nill | Since 2003; Was US 666 |
| US 93 | Eureka, MT * | Wickenburg, AZ | 1340 | MT ID NV AZ | ID-75 NV-168 I-15 NV-604 NV-582 | Since 1926; S exten Glendale, NV 1932; Kingman, AZ 1937; congress JCT 1968; Curr 1992; Cntd to Jasper, AB, Canada via BC-93 and AB-93 |
| US 95 | Eastport, ID * | San Luis, AZ * | 1574 | ID (WA) ID OR NV CA AZ | Alt US 95 Spur US 195 US 195 I-80 Alt US 50 US 50 NV-582 | Since 1926; /E//W/ S exten E. Blythe, CA 1940; Curr 1961; in WA 1955-1986; Cntd to Golden, BC, Canada via BC-95 |
| US 195 | (Sandpoint, ID) Spokane, WA | Lewiston, ID + | 95 (186) | (ID) WA ID | US 2 | Since 1926; N trunc 1969 |
| (US 295) | (Colfax, WA) | (Dodge, WA) | (45) | (WA) | WA-26 WA-127 | Exist 1926-1968 |
| US 395 | Laurier, WA * | Cajon Jct., CA + (San Diego, CA) | 1305 (1490) | WA OR CA NV CA | WA-231 WA-292 WA-904 US 410 US 12 US 730 OR-37 I-15 I-215 CA-74 I-15 CA-76 CA-78 I-15 CA-163 | Since 1926; S exten 1934; Cntd to Cascade, BC, Canada via BC-395 |
| US 97 [I] | Oroville, WA * | Weed, CA | 663 (681) | WA OR CA | Alt US 97 OR-62 OR-66 | Since 1926; S exten 1934; Cntd to Contact Creek, BC, Canada via BC-97 |
| (US 97) [II] | (Tetlin NWR, AK *) | (Livengood, AK) | (289) | (AK) | AK-2 | On some maps 1957-1958 |
| (US 97) [III] | (Council, AK) | (Nome, AK) | (73) | (AK) | Nome-Council Hy | On some maps 1957-1958 |
| US 197 | (Maryhill Jct., WA) Smithville, WA | Cow Canyon Jct., OR | 62 (87) | WA OR | WA-4 | Since 1952; No signs from Maryhill Jct., WA to Smithville, WA since 1968 |
| (US 99) | (Blaine, WA *) | (Calexico, CA *) | (1569) | (WA) (OR) (CA) | Historic US 99 signs are appearing in CA; I-5 Alt US 99 WA-11 I-5 WA-99 I-5 WA-411 WA-4 I-5 US 99E OR-99E I-5 OR-99E OR-99 OR-126 I-5 OR-38 OR-99 OR-42 I-5 US 199 OR-99 I-5 OR-99 I-5 CA-96 CA-263 I-5 CA-273 I-5 US 99W I-5 CA-113 I-80 US 50 CA-99 I-5 CA-134 I-210 US 66 CA-66 US 395 I-215 I-10 CA-86 CA-111 | Exist 1926-1972; /E//W//E//W//E//W/ S trunc Los Angeles, CA 1964; N trunc Portland, OR 1971; US 99 signs are in Seattle, WA in 1999; Cntd to Cache Creek, BC, Canada via BC-99 |
| US 199 | Grants Pass, OR | Crescent City, CA | 80 (86) | OR CA | Nill | Since 1926; E exten 1971 |
| (US 299) | (Alturas, CA) | (Arcata, CA) | (295) | (CA) | CA-299 | Exist 1934-1964 |
| (US 399) | (Bakersfield, CA) | (Ventura, CA) | (136) | (CA) | US 99 CA-204 CA-33 CA-119 | Exist 1934-1964 |
| US 101 | Olympia, WA | Los Angeles, CA (San Ysidro, CA *) | 1519 (1896) | WA OR CA | OR-42 OR-42S CA-254 CA-271 US 101W [I] CA-82 CA-72 I-5 US 101W [II] Historic US 101 | Since 1926; /E//W//E//W/ Was ferry; S trunc 1966 |
U.S. Highways
| US 1 | US 11 | US 21 | US 31 | US 41 |
| US 51 | US 61 | US 71 | US 81 | US 91 |
| US 2[I] | US 10 [I] | US 20 [I] | US 30 | US 40 |
| US 50 | US 60 | US 70 | US 80 | US 90 |