Ravalli County Montana (Historic Districts) has 5 places on the National Register of Historic Places including 1 place of National significance and 1 place of Statewide significance. Significant places include Rocky Mountain Laboratory Historic District and West Fork Ranger Station, Hamilton Commercial Historic District, Hamilton Southside Residential Historic District and University Heights Historic District.
Some of the country's most noteable architects helped create the Ravalli County places including H.E. Kirkemo, A.J. Gibson, Marion Mahoney, Frank Lloyd Wright and William Drummond. Prominent architectural styles found in Ravalli Country are Colonial Revival, Bungalow/Craftsman and Mission/Spanish Revival.