This Art Deco courthouse replaced an earlier building on the site, just north of Plankinton’s main commercial district. Aurora County, which was created in 1879 and organized in 1881, designated Plankinton its county seat. Voters approved a bond measure for the construction of a two-and-a-half-story, wood-framed courthouse and jail designed by Theodore Mix and built in 1884 by Thomas Henning and Son. This building served the county’s needs until the late 1930s.