Oregon Route 331

Oregon Route 331
Route 331 highlighted in red
Route information
Maintained by ODOT
Length	4.84 mi[1] (7.79 km)
Existed	2003–present
Major junctions
South end	I-84 / US 30 near Mission
North end	OR 11 near Mission
Location
Country	United States
State	Oregon
Highway system
Oregon Highways Interstate US State Named Scenic
← OR 293 → OR 332

Oregon Route 331 (OR 331) is a short state highway in Umatilla County, Oregon. The highway runs 5 miles (8 km) entirely on the Umatilla Indian Reservation from Interstate 84 to OR 11 near Mission. OR 331 is known as the Umatilla Mission Highway No. 331 (see Oregon highways and routes).

OR 331 was established in 2003 as part of Oregon's project to assign route numbers to highways that previously were not assigned.