The Tillman County Courthouse, at 201 N. Main St. in Frederick, Oklahoma, was built in 1921.

It was listed on the National Register of Historic Places in 1984.

It is a three-story concrete slab building with concrete slabs presented to resemble cut stone.

Its back/north side has a curved wall projecting about 15 feet (4.6 m).

This article about a property in Oklahoma on the National Register of Historic Places is a stub.