The Willamette Valley is a geographic region in northwest Oregon, United States. Willamette Valley may also refer to: Willamette Valley (ecoregion), the associated ecoregion Willamette Valley (train), Amtrak-operated train in the same area Willamette Valley AVA, the American Viticultural Area in the region MV Willamette Valley, a 1928 Q-ship that served as HMS Edgehill during World War 2