The Keokuk County Courthouse located in Sigourney, Iowa, United States, was built in 1911. It was individually listed on the National Register of Historic Places in 1981 as a part of the County Courthouses in Iowa Thematic Resource.^[2] In 1999 it was included as a contributing property in the Public Square Historic District.^[3] The courthouse is the fourth building the county has used for court functions and county administration.

Keokuk County built its first courthouse in Sigourney in 1845 for $218.^[4] The 24-by-20-foot (7.3 by 6.1 m) building, which was constructed of logs, also housed the jail and served as a schoolhouse, public hall, and hotel.^[5] Lancaster became the county seat in the late 1840s and a two-story frame courthouse was built there in 1848 for $699. By the mid-1850s the county seat was back in Sigourney. A new courthouse was built in 1858 for $17,200.^[4] It was remodeled over the years until the present courthouse was begun in 1909. It was completed two years later at a cost of $150,000.^[4]

The building was designed in the Classical Revival style by the Des Moines architectural firm Wetherell & Gage, and built by J.L Simmons. The Columbian Exposition of 1893 in Chicago influenced the design of the building.^[3] The Bedford limestone structure rests on a raised basement level. Each facade features a frontispiece with large engaged columns in the Ionic order that are set in antis above first floor level.^[6] It is capped by a clock tower and cupola. Other historic structures on the courthouse square include a fountain, bandstand, and a Civil War Monument. The significance of the courthouse is derived from its association with county government, and the political power and prestige of Sigourney as the county seat.^[6]

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