The Adair County Courthouse, located in Greenfield, Iowa, United States, was built from 1891 to 1892.

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

It was destroyed by fire in 1889 and courthouse functions moved to a nearby opera house until a new structure was completed.

The tornado narrowly missed striking the Adair County courthouse by as little as 5-6 blocks.

[5][6] The 2½-story brick structure utilizes limestone for the high foundation, the water table, the belt courses at the top of the windows, the capitals of the brick pilasters, and for the arched surround that frames the main entrance.