Cornell Road is an east–west street and traffic corridor in the Portland metropolitan area, in Multnomah and Washington counties in the U.S. state of Oregon.

[1] Cornell Road runs between the western end of Northwest Lovejoy Street in the Hillside neighborhood of Portland to East Main Street in Hillsboro, passing through unincorporated parts of Washington County and through Beaverton on the way.

Although intended, on its section within the city of Portland, to be a neighborhood collector street with relatively low traffic volumes, it has often functioned as a major traffic street and commuter highway between downtown Portland and its western suburbs.

It shares this role with more intensely busy traffic corridors along West Burnside Street and U.S. Route 26 (US 26).

Serving communities on the western side of the West Hills, it has stops between Northwest Cedar Hills Boulevard/Northwest 113th Avenue (opposite sides of the same intersection), in Cedar Mill, and Cornell Road's western terminus in Hillsboro.

[10] Cornell Road passes through two tunnels drilled through basalt in the West Hills.

[17] The realignment projects, together with widening of certain other two-lane sections of Cornell to four or more lanes during that period, were intended by Hillsboro and Washington County officials to transform the road into a major arterial in the Beaverton–Hillsboro area, the "third-largest east–west thoroughfare" on the Portland metropolitan area's west side[15] (after the Sunset Highway/US 26 and Tualatin Valley Highway).