Oregon Route 429 (OR 429) is an Oregon state highway running from OR 58 at Crescent Lake Junction to Lava Odell Road in Crescent Lake.

It is 2.39 miles (3.85 km) long and runs northeast to southwest, entirely within Klamath County.

OR 429 was established in 2002 as part of Oregon's project to assign route numbers to highways that previously were not assigned, and, as of July 2020, was unsigned.

OR 429 begins at an intersection with OR 58 at Crescent Lake Junction and heads southwest to Crescent Lake, where it ends at an intersection with Lava Odell Road.

OR 429 was assigned to the Crescent Lake Highway in 2002.