All Roads Lead To Hardin County: Provides an overview and histories of its communities.
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.
Hardin County, Iowa: Provides a National Register of Historic Places travel itinerary. Includes descriptions of sites and photos.
Iowa State University - Hardin County Extension: Provides news, a list of services, community and business information, events, a staff directory, photos and office hours. Located in Iowa Falls.