Lewiston is a city in and also the county seat of Nez Perce County in the Pacific Northwest state of Idaho. It is the second-largest city in the northern Idaho region, behind Coeur d'Alene and ninth-largest in the state. Lewiston is the principal city of the Lewiston, ID - Clarkston, WA Metropolitan Statistical Area, which includes all of Nez Perce County and Asotin County, Washington. As of the 2000 census, the population of Lewiston was 30,904 (2006 estimate: 31,293).Lewiston is located at the confluence of the Snake River and Clearwater River, thirty miles (48 km) northwest of the Lower Granite Dam. Because of dams (and their locks) on the Snake and Columbia River, Lewiston is reachable by some ocean-going vessels. The Port of Lewiston (Idaho’s only seaport) has the distinction of being the farthest inland port east of the West Coast of the United States. The Lewiston-Nez Perce County Airport serves the city by air.

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