| State: | OR |
| Type: | OR |
| Route: | 3 |
| Map Custom: | yes |
| Map Notes: | Route 3 highlighted in red |
| Length Mi: | 43.13 |
| Established: | 1932 |
| Allocation: | Enterprise–Lewiston Highway No. 11 |
| Direction A: | South |
| Terminus A: | in Enterprise |
| Direction B: | North |
| Terminus B: | near Flora |
| Counties: | Wallowa |
| Previous Type: | US |
| Previous Route: | 730 |
| Next Type: | I |
| Next Route: | 5 |
Oregon Route 3 is a state highway in the U.S. state of Oregon. It is located entirely within Wallowa County. OR 3 is the lowest numbered highway in the state of Oregon, of any type (state, federal, or Interstate). OR 3 traverses the Enterprise–Lewiston Highway No. 11 of the Oregon state highway system.[1]
OR 3 has its southern terminus at a junction with Oregon Route 82 in the city of Enterprise. It runs north/south, passing near the small community of Flora. It terminates at the Washington border. The route continues north through Anatone and Asotin, Washington and into Clarkston, Washington as State Route 129. From Clarkston, U.S. Route 12 provides direct access to Lewiston, Idaho.
An earlier routing passed through the community of Paradise, located east of the highway's current location.[2] The highway was numbered to match Washington State Route 129, which had been a branch of Primary State Highway 3, and its predecessor State Road 3, from 1923 to 1964.