National Register of Historical Places - Jackson County - Provides a listing of properties, districts, and landmarks in the county. Includes architectural style and period of significance. - http://www.historicdistricts.com/IA/Jackson/state.html
Jackson County Historical Society - Founded in 1903. Presents its history, events, projects, membership information and list of publications for sale. Located in Maquoketa. - http://www.jciahs.com/
The Political Graveyard: Jackson 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/JC.html#BORN