The Poweshiek County Courthouse in Montezuma, Iowa, United States, was built in 1859.

It was individually listed on the National Register of Historic Places in 1981 as a part of the County Courthouses in Iowa Thematic Resource.

Poweshiek County's first courthouse was a two-story frame building constructed on the northeast corner of the town square in 1850.

[4] Drake & Dryden designed and built the Greek Revival structure, which is one of the oldest courthouses and one of few that are left in this architectural style in Iowa.

The building also features pedimented gable ends, a wide triglyph frieze, and pilasters whose caps crowd the tops of the second-story windows.