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County Information



Some of the cities, towns, and places in Washington County are Cambridge, Midvale, Weiser

Washington County  Image

Washington County is a county in the U.S. state of Idaho. As of the 2010 census, the population was 10,198. The county seat and largest city is Weiser, with over half of the county's population. The county was established in 1879 when Idaho was a territory and named after U.S. President George Washington. Washington County is home to the Idaho ground squirrel.