#129351. Welcome to Official City of Grangeville Idaho Website The City of Grangeville is located in Idaho County along U.S. Highway 95 where the edge of the Camas Prairie and Nez Perce National Forest converge before rising 2800 vertical feet from the floor of the prairie to provide an unequaled backdrop for the City of Grangeville. Grangeville.us~Site InfoWhoisTrace RouteRBL Check