Prehistoric cultural affiliation(s) include Nehalem Tillamook and Late Holocene dating back to 500.
Some of the country's most noteable architects helped create the Tillamook County places including Sound Construction & Engineering Co., US Bureau of Yards and Bocks, US Bureau of Yards and Docks, Albert E. Doyle, F.P. Humke, Clackamas Construction Co., Lucia Wiley, Charles B. Duhrkoop, Louis A. Simon and Conde B. McCullough. Prominent architectural styles found in Tillamook Country are Classical Revival, Late 19th And Early 20th Century American Movements and Art Deco.