Williamson County Illinois (Historic Districts) has 1 places on the National Register of Historic Places including 1 place of Statewide significance. Significant places include Marion Veterans Administration Hospital Historic District.
Some of the country's most noteable architects helped create the Williamson County places including L.E. Tery and VA Constuction Service. Prominent architectural styles found in Williamson Country are Late 19th And 20th Century Revivals.
Marion Veterans Administration Hospital Historic District
(added 2013 - - #12001146)