The Jackson County Historical Society seeks to preserve and share the history of Jackson County, Missouri. To this end, the society operates a lending library and non-circulating archive; 1859 jail, marshal's home, and museum; and the Harry S Truman Office and Courtroom, where Truman (1884-1972) practiced prior to being elected Senator and 33rd President of the United States. The jail presents local legal and military history between the 1840s and the Civil War.

The society offers circulating library and non-circulating archives access, research assistance, self-guided and guided tours of the jail and marshal's home, exhibits, tours of the office and courtroom, and a 30-minute introductory film in the Truman site. Payment is required for non-member library archives access and research assistance. Reservations are required for library and archives access, guided tours of the jail and marshal's home, and group tours of the office and courtroom. The website offers a teacher's guide for the jail site.