Hardin County Democrats
- Contains editorials and links to candidates' web sites.
- http://www.orgsites.com/ia/hardincountydems/

Hardin County Empowerment Area
- Organizes services that work to raise the quality of life for children. Includes descriptions of services, photographs, and contact information.
- http://www.empowerhardin.com/

National Register of Historical Places - Hardin County
- Provides a listing of properties, districts, and landmarks in the county. Includes architectural style and period of significance.
- http://www.historicdistricts.com/IA/Hardin/state.html

The Political Graveyard: Hardin County, Iowa
- Database provides political history, cemetery locations, and brief biographies of politicians who were born or lived in the county.
- http://politicalgraveyard.com/geo/IA/HA.html#BORN