Sunnyside is an unincorporated community in Umatilla County, Oregon, United States.

[1] It is about 3 miles (5 km) north of Milton-Freewater, at the intersection of Oregon Route 332, which is also known as the Sunnyside-Umapine Highway, and Oregon Route 339.

[2] Sunnyside was once a station on the Walla Walla Valley Railway, which served the local fruit orchards, and the site of a Nebraska Bridge Supply and Lumber Co. planing mill from 1958 to 1963.

[3] Inland Fir Company also had a sawmill.

This Umatilla County, Oregon state location article is a stub.