The courthouse was authorized in 1893 to accommodate the growing county's needs and completed the following year.

The three-story sandstone building has arched entrances on all four sides.

A clock tower rises above the center of the building, and several dormers project from the sides of the roof.

[2] The courthouse was added to the National Register of Historic Places on June 17, 1982.

This article about a property in Mercer County, Illinois on the National Register of Historic Places is a stub.