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

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

The Political Graveyard - Washington 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/WA.html

Industrial Foundation of Washington County
- Includes incentive programs, available sites, workforce training, development agencies, news, and manufacturers directory.
- http://www.ifwc.net/

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

Washington County Convention & Visitors Bureau
- Information about Greenville and the surrounding area.
- http://www.thedelta.org/