Kittitas County Washington (Historic Districts) has 8 places on the National Register of Historic Places including 6 places of Statewide significance. Significant places include Cabin Creek Historic District, Chicago, Milwaukee, St. Paul and Pacific Railroad: South Cle Elum Yard, Downtown Ellensburg Historic District, Liberty Historic District and Olmstead Place State Park.
Some of the country's most noteable architects helped create the Kittitas County places including Samuel B. Olmstead. Prominent architectural styles found in Kittitas Country are Bungalow/Craftsman and Colonial Revival.