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

The Political Graveyard: Ida 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/ID.html#BORN