Linn County Republican Party
- Provides information about the central committee, events, volunteerism and contacts.
- http://www.linncountygop.com/

Linn County Democratic Party
- Includes county constitution, bylaws, directory of elected officials, calendar, and volunteer form.
- http://www.linncountydemocrats.org/

Cedar Valley Habitat for Humanity
- Ecumenical housing organization that seeks to eliminate substandard housing in Linn and Benton counties. Includes events, volunteer information and photographs.
- http://www.cvhabitat.org/

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

The Political Graveyard: Linn County, Iowa
- Features political history, lists of politicians who were born, lived or died in the county, and a list of cemeteries.
- http://politicalgraveyard.com/geo/IA/LI.html