| State: | OR |
| Type: | OR |
| Route: | 233 |
| Map Custom: | yes |
| Map Notes: | Route 233 highlighted in red |
| Length Mi: | 10.70 |
| Length Round: | 2 |
| Direction A: | South |
| Terminus A: | near Amity |
| Junction: | in Dayton |
| Direction B: | North |
| Terminus B: | near Dayton |
| Previous Type: | OR |
| Previous Route: | 230 |
| Next Type: | OR |
| Next Route: | 234 |
Oregon Route 233 is an Oregon state highway which runs between the cities of Amity and Dayton, USA, in the Willamette Valley.
OR 233 begins at an intersection with Oregon Route 99W in Amity. It heads northeast from there, passing through Willamette Valley farmland, ending at an intersection with Oregon Route 18 between Dayton and McMinnville. The highway then heads east (through Dayton), concurrent with OR 18, before both highways terminate at an intersection with OR 99W just west of Dundee.
OR 233 comprises part of the Salmon River Highway No. 39 (see Oregon highways and routes), part of the Lafayette Highway No. 154, and the Amity-Dayton Highway No. 155. The concurrency with OR 18 comprises the Salmon River Highway section.