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.

OR 233 comprises part of the Salmon River Highway No.

The concurrency with OR 18 comprises the Salmon River Highway section.