Jefferson County Washington (Vacant / Not In Use) has 5 places on the National Register of Historic Places including 1 place of National significance. Significant places include Kuhn Spit Archeological Site, Botten Cabin, Elk Lick Lodge, Irondale Jail and Nelson House.
Prehistoric cultural affiliation(s) include Chimacum dating back to 1000.
Some of the country's most noteable architects helped create the Jefferson County places including Grant Humes and Tollef Sole. Prominent architectural styles found in Jefferson Country are .