The Plymouth County Courthouse located in Le Mars, Iowa, United States, was built in 1891.

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

[3] It was designed by Minneapolis architectural firm of Kinney & Detweiler and built by a local contractor Emil Miller.

He was physically and verbally abused, and they attempted to coerce him to agree to the constitutionality of the Debtor Relief Law by threatening him with lynching.

[4] The interior features ceramic tile floors in the public areas, and past a wide column screen is a double wooden staircase.