Iowa Lincoln Highway Association
- History, documentation, photographs and postcards of the Iowa portion of the first transcontinental road. Link to Burma-Shave history.
- http://www.lincolnhighwayassoc.org/iowa/

State Historical Society of Iowa
- Identifies, records, collects, preserves, manages, and provides access to the state's historical resources. Includes a list of historic sites, grants, library services, a museum, archives, membership, publications and volunteerism. Located in Des Moines.
- http://www.iowahistory.org/

Iowa Historical Societies
- Locate address information, including web site links, to historical societies in each county within the state of Iowa.
- http://www.daddezio.com/society/hill/SH-IA-NDX.html

Iowa Barn Foundation
- Dedicated to preserving Iowa's rural buildings. Information about grants, events, membership.
- http://www.iowabarnfoundation.org/