Prehistoric cultural affiliation(s) include Umatilla and Chinese dating back to 499 BC.
Many famous people are associated with these Umatilla County historic places including Judge William Russell Ellis, Joseph Cuhna, Edgar Sommerville, Joseph Vey, William S. Frazier and Mary Benson Johnson.
Some of the country's most noteable architects helped create the Umatilla County places including Oscar Wenderoth, Lemuel Dunlap, C.M. Himebaugh, Folger Johnson, M.V. Wormington, John Cahoon, Raymond Hatch, John Tourtellotee, Carl Searchermeyer and E.A. Williams. Prominent architectural styles found in Umatilla Country are Italianate, Late 19th And 20th Century Revivals and Bungalow/Craftsman.