Wikipedia: Decatur County, Iowa
- Encyclopedia article covers geography, demographics and links to cities and towns. With maps.
- http://en.wikipedia.org/wiki/Decatur_County,_Iowa

City-Data.com: Decatur County, Iowa
- Profiles population demographics, jobs, housing, agriculture and crime statistics. Contains a list of recreational areas, churches, cemeteries, post offices, charts, graphs and maps.
- http://www.city-data.com/county/Decatur_County-IA.html

Decatur County , Iowa - US Census Bureau
- Provides population, demographic, and housing information.
- http://quickfacts.census.gov/qfd/states/19/19053.html

Iowa State University Extension - Decatur County
- Offers agricultural, business, family and 4-H programs and resources. Includes staff directory, news, events, hours and directions. Located in Leon.
- http://www.extension.iastate.edu/decatur/

Decatur County Hospital
- Serving the residents of southern Iowa and northern Missouri. Contains details of services, news, and directories of physicians and departments. Located in Leon.
- http://www.decaturcountyhospital.org/

Central Decatur Schools
- Serving students in Leon, Decatur City, Grand River, Davis City and Pleasanton. Includes a mission statement, a list of schools, activities and achievement data. District office located in Leon.
- http://www.central-decatur.k12.ia.us/

Decatur County Development Corporation
- Non-profit, public/private partnership focused on improving the economy of the area, through the recruitment and retention of employers, promotion of tourism and recreation, and housing development. Includes descriptions of communities, demographics and a
- http://www.grm.net/~dcdc/