Wikipedia: Hardin County, Iowa
- Encyclopedia article contains geography, demographics and links to cities and towns. Includes maps.
- http://en.wikipedia.org/wiki/Hardin_County,_Iowa

Hardin County, Iowa
- Provides a National Register of Historic Places travel itinerary. Includes descriptions of sites and photos.
- http://www.nps.gov/history/nr/travel/hardin/

Hardin County Savings Bank
- Offers personal and business banking, investment, lending and insurance services, and trust and farm management. Includes descriptions of services, hours and locations.
- http://www.hardincsb.com/

City-Data.com: Hardin 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/Hardin_County-IA.html

Hardin County, Iowa - US Census Bureau
- Provides population, demographic, and housing information.
- http://quickfacts.census.gov/qfd/states/19/19083.html

Greenbelt Home Care
- Certified nonprofit agency that provides public health and home care nursing services to area residents. Contains descriptions of services and photographs. Located in Eldora.
- http://www.greenbelthomecare.com/

Hardin County Agricultural Society
- Hosts annual fair in July. Includes schedule, grandstand entertainment, calendar of events, results and photographs. Located in Eldora.
- http://www.hardincountyfair.com/

Hardin County Conservation Board
- Dedicated to provide recreational opportunities, protect the county's natural resources and offer educational programs. Includes its history, details of parks, naturalist notes, and a calendar of events. Located in Ackley.
- http://hardincountyconservation.com/

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

All Roads Lead To Hardin County
- Provides an overview and histories of its communities.
- http://www.hardincountyonline.com/