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Portland is the largest city in the U.S. state of Oregon and the seat of Multnomah County. It is a major port in the Willamette Valley region of the Pacific Northwest, at the confluence of the Willamette and Columbia rivers. The city covers 145 square miles and had an estimated population of 647,805 in 2017, making it the 26th most populous city in the United States, and the second-most populous in the Pacific Northwest. More from Wikipedia...