Lewis and Clark County Montana (Vacant / Not In Use) has 10 places on the National Register of Historic Places including 1 place of National significance and 2 places of Statewide significance. Significant places include Kluge House, Eagle's Site and Stedman Foundry and Machine Company, Cuthbert, D. H., House and Eagle's Site.
Prehistoric cultural affiliation(s) include Late Plains Archaic dating back to 999 BC.
Some of the country's most noteable architects helped create the Lewis and Clark County places including Emil Kluge, M. Boardman, Benson, Ben and et al.. Prominent architectural styles found in Lewis and Clark Country are Queen Anne.