The Douglas County Courthouse and Auditor's Office in Armour, South Dakota was listed on the National Register of Historic Places in 1978.

[1] The courthouse, built in 1927, is a Classical Revival building designed by Sioux Falls architects Perkins & McWayne.

It is a three-story red brick building, 81.2 by 61.2 feet (24.7 m × 18.7 m) in plan, with brick laid in Flemish bond.

[2] The former auditor's office, which in 1976 was the Douglas County Museum, is a one-story brick building designed by W.L.

This article about a property in South Dakota on the National Register of Historic Places is a stub.