Prehistoric cultural affiliation(s) include Middle Woodland Tradition, Kathio Phase, Malmo, St. Croix and Ojibwa dating back to 999 BC.
The famous person Patrick Casey is associated with one of more of the Aitkin County historic places.
Some of the country's most noteable architects helped create the Aitkin County places including N.J. Holden, Fritz Slathar, King & Day Toltz, Claude & Stark, Henry Seth and E.C. Pell. Prominent architectural styles found in Aitkin Country are Beaux Arts, Classical Revival and Mission/Spanish Revival.