The Polk County Courthouse located in Des Moines, Iowa, United States, was built in 1906.

It was listed on the National Register of Historic Places in 1979 as a part of the County Courthouses in Iowa Thematic Resource.

[2] Measuring 242 by 132 feet (74 by 40 m), the rectangular structure was designed by the Des Moines architectural firm of Proudfoot & Bird.

The former county jail (also on a lot adjacent to the courthouse) was partially demolished and rebuilt to host the criminal courts.

The interior features a large stained glass domed rotunda, marble columns, and murals by Charles A. Cummings and Edward Simmons.