List of highway route numbers in Oregon Mainline routes Mainline routes

| Number_ | South_west_end | North_east_end | Formed | Eliminated_ |
|---|---|---|---|---|
| U.S. Route 30 Business | I-84/US 30/OR 201 north of Ontario | I-84/US 30 in Ontario | 1980 |  |
| U.S. Route 30 Business | OR 99E in Portland | US 30BY in Portland | 1967 | 2007 |
| U.S. Route 30 Bypass | US 30 in Portland | I-84/US 30 in Fairview | 1936 |  |
| U.S. Route 30N | Former US 30 south of Huntington | Weiser, ID | 1927 | 1980 |
| U.S. Route 30S | US 30 in Ontario | Towards Parma, ID | 1938 | 1940 |
| U.S. Route 630 | Former US 30 south of Huntington | Weiser, ID | 1926 | 1927 |
| U.S. Route 730 | I-84/US 30 east of Boardman | US 730 towards Walla Walla, WA | 1926 |  |
| U.S. Route 95 | US 95 towards Winnemucca, NV | US 95 towards Homedale, ID | 1939 |  |