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Capital:Boise...(Show more)Population:(2020) 1,841,377...(Show more)Governor:Brad Little (Republican)...(Show more)Date Of Admission:July 3, 1890...(Show more)U.S. Senators:Mike Crapo (Republican)James E. Risch (Republican)...

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Idaho, constituent state of the United States of America. It ranks 14th among the 50 U.S. states in terms of total area. Its boundaries—with the Canadian province of British Columbia to the north and the U.S. states of Montana and Wyoming to the east, Utah and Nevada to the south, and Oregon and Washington to the west—are both historical and geographic in derivation. The boundary with British Columbia follows the 49th parallel of north latitude, while the border with Utah and Nevada follows the 42nd parallel; both lines were established by treaty—the northern between the United States and Britain in 1846 and the southern between the United States and Spain in 1819. The border with Montana follows the Continental Divide, while the border with Wyoming incorporates a small slice of Yellowstone National Park. Idaho’s border with Oregon and Washington is a 480-mile (770-km) straight stretch except between the Idaho cities of Weiser and Lewiston, where Hells Canyon of the Snake River serves as a natural boundary. Boise is the state capital.