| Sangamon | Henry Stephens | |
| Sangamon | Abraham Lincoln and the Talisman | 01/01/1966 |
| Sangamon | Barack Obama Campaign Announcements (2007-2008) | 11/30/2022 |
| Sangamon | Camp Butler | 12/14/2011 |
| Sangamon | Clayville | 08/01/1966 |
| Sangamon | Edwards Trace, The | 09/09/2002 |
| Sangamon | General John A. McClernand, 1812-1900 | 01/01/1979 |
| Sangamon | Hutchinson Cemetery & Springfield High School | 03/01/2005 |
| Sangamon | Illinois State University/Concordia Theological Seminary | 10/27/2013 |
| Sangamon | Lincoln Depot, The | 05/01/1967 |
| Sangamon | Lincoln-Herndon Law Offices | 01/01/1991 |
| Sangamon | Lindbergh Field (missing) | 01/01/1968 |
| Sangamon | Lithuanians in Springfield | 05/19/2012 |
| Sangamon | Old State Capitol | 01/01/1991 |
| Sangamon | Peter Cartwright | 01/01/1934 |
| Sangamon | Reservoir Park and Lanphier High School | 05/22/2007 |
| Sangamon | Robert Stuart Fitzgerald Boyhood Home | 10/12/2010 |
| Sangamon | Springfield Home for the Friendless/Family Service Center | 04/30/2015 |
