Kittitas County Washington (Vacant / Not In Use) has 4 places on the National Register of Historic Places including 2 places of Statewide significance. Significant places include Northwestern Improvement Company Store and Thorp Mill, Chicago, Milwaukee, St. Paul & Pacific Railroad--Kittitas Depot, Salmon la Sac Guard Station.
Some of the country's most noteable architects helped create the Kittitas County places including Oren Hutchinson and Kittitas Railway & Power Co.. Prominent architectural styles found in Kittitas Country are .
