MSGenWeb - Simpson County
- Local history and resources for genealogical researchers.
- http://www.rootsweb.com/~mssimpso/

National Register of Historical Places - Simpson County
- Directory of historical places and cultural resources for the county. Offers historical significance, architect details, and related information.
- http://www.nationalregisterofhistoricplaces.com/MS/Simpson/state.html

The Political Graveyard: Simpson County
- Database of political history and cemeteries, with brief biographical entries for political figures connected to the county, living and dead, from the 1700s to the present.
- http://politicalgraveyard.com/geo/MS/SI.html

Simpson County Economic Development
- News and information about the county's business community and economic development efforts.
- http://www.simpsoncounty.biz/

Simpson County School District
- Mission statement, news, administrative directory, and links to schools.
- http://www2.mde.k12.ms.us/6400/index.htm

Mississippi Department of Transportation
- PDF map of Simpson county roads. [Adobe Acrobat Reader required]
- http://www.gomdot.com/maps/County_maps/Simpson.pdf