Asotin is the county seat of Asotin County, Washington, United States. The population of the city was 1,251 at the 2010 census. It is part of the Lewiston, ID - WA Metropolitan Statistical Area.HistoryThe name Asotin is derived from a Nez Perce language term meaning "eel creek". It was founded in 1878 by Alexander Sumpster. A river ferry stop at Asotin was set up by 1881.GeographyAsotin is located at . The elevation is 801 feet above sea level.According to the United States Census Bureau, the city has a total area of 1.19sqmi, of which, 1.05sqmi is land and 0.14sqmi is water.ClimateThis region experiences warm and dry summers, with no average monthly temperatures above 71.6 °F. According to the Köppen Climate Classification system, Asotin has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.Demographics2010 censusAs of the census of 2010, there were 1,251 people, 500 households, and 352 families residing in the city. The population density was 1191.4PD/sqmi. There were 537 housing units at an average density of 511.4/sqmi. The racial makeup of the city was 93.5% White, 1.0% African American, 1.5% Native American, 0.6% Asian, 1.0% Pacific Islander, 0.2% from other races, and 2.2% from two or more races. Hispanic or Latino of any race were 2.2% of the population.