Decatur County Historical Society
- Group dedicated to preserving artifacts and documents of the area's past. Pictures and story of the museum, brief county history, and a membership application.
- http://www.greensburgdecaturcounty.com/org/dchs/

Decatur County United Fund
- A not-for-profit organization to raise funds for other not-for-profit organizations. Includes calendar of events, agencies serviced, and recent news.
- http://www.dcuf.com/

Decatur County Community Foundation
- An organization founded in 1992 to help donors contribute to local charities. Includes history, support, grant and scholarship information.
- http://www.dccfound.org/

Decator County Youth Soccer Club
- Teams, schedules, standings, news, links. Recreational club based in Greensburg with boys and girls teams from U-06 to U-14.
- http://www.dcysc.org/

Stats Indiana
- Decatur county profile, statistics for the year 2004. Population changes, housing, household types, education, income, poverty and labor force.
- http://www.stats.indiana.edu/profiles/pr18031.html

County Genealogy
- Part of the INGenWeb Project. Biographies, census records, information on cemeteries and local history, query service, links.
- http://www.rootsweb.com/~indecatu/indecatu.html

County Government
- Phone and email contact information for county departments and related offices.
- http://www.decaturcounty.in.gov/

Decatur County School Corporation
- Public education district for the area. Provides administrative and policy information, individual school web pages.
- http://www.decaturco.k12.in.us/

The Political Graveyard
- Information on the political history, cemeteries and memorial sites in the county.
- http://politicalgraveyard.com/geo/IN/DC.html#CEM