The
Tualatin Valley is a farming and suburban region southwest of
Portland,
Oregon in the
United States. The valley is formed by the
meandering Tualatin River, a tributary of the
Willamette River at the northwest corner of the
Willamette Valley, east of the
Northern Oregon Coast Range. Most of the valley is located within
Washington County, separated from Portland by the
Tualatin Mountains. Communities in the Tualatin Valley include
Banks,
Forest Grove,
Cornelius,
Hillsboro,
Aloha,
Beaverton,
Sherwood,
Tigard, and
Tualatin.