List of highway route numbers in Oregon Mainline routes Mainline routes

| Number_ | South_west_end | North_east_end | Formed | Eliminated_ |
|---|---|---|---|---|
| Oregon Route 227 | OR 62 at Trail | South of Tiller | 1935 | 1986 (restored 2003) |
| Oregon Route 228 | OR 99E in Halsey | US 20 in Sweet Home | 1935 |  |
| Oregon Route 229 | US 20 north of Toledo | US 101 at Kernville | 1935 |  |
| Oregon Route 230 | OR 62 near Union Creek | OR 138 near Diamond Lake | 1935 |  |
| Oregon Route 231 |  |  |  |  |
| Oregon Route 232 | Crater Lake National Park | US 97 | 1935 | 1980s |
| Oregon Route 233 | OR 99W north of Amity | OR 99W northeast of Dayton | 1935 |  |
| Oregon Route 234 | I-5 west of Gold Hill | OR 62 north of Eagle Point | 1935 |  |
| Oregon Route 235 |  |  |  |  |