Sangamon County Historical Society
- Collecting and promoting the history and heritage through publications, programs, and events. The Historico Newsletter is available online.
- http://www.sancohis.org/

Sangamon County Republican Central Committee
- Offers views, candidates and campaigns, an events calendar, donation information, and volunteer resources.
- http://www.sangamonrepublicans.com/

Will Reynolds for Sangamon County Board
- Running for District 22, the candidate offers personal information, news, a calendar of events, donation information, form for volunteering, and a Blog. Campaign site is located in Springfield.
- http://www.willreynolds.us/

Sangamon County Data
- Statistical information from the 1990 Illinois Census.
- http://www.communitydevelopment.uiuc.edu/census/Sangamon.html

The Political Graveyard: Sangamon County
- Find out what politicians were born in the area, lived here, died here, and what County Cemeteries are the "permanent" homes for them.
- http://politicalgraveyard.com/geo/IL/SG.html

ILGenWeb - Sangamon County
- Historical archives of families with pictures, news articles from early newspapers, 1830 and 1850 census information, biographies, Bible records, obituaries, and deeds.
- http://www.rootsweb.com/~ilsangam/sangamon.htm