Iowa Maps

The Perry-Castañeda Library Map Collection.
http://www.lib.utexas.edu/maps/iowa.html

Iowa Dept of Transportation maps

city and county maps (DGN and DWG formats only)
http://www.dot.state.ia.us/sitemap.htm#maps

Iowa Geological Survey

Plans and implements programs that result in the acquisition of comprehensive information on the mineral and water resources of the State, with emphasis on water supply developments and monitoring the effects of environmental impacts on water quality. In
http://www.igsb.uiowa.edu/

Road map of Iowa

A compact map showing interstate and U.S. highways plus major cities and towns.
http://www.sitesatlas.com/Maps/Maps/IA1.htm

Mapathon Iowa

Features road, city street, and specialized maps and guides.
http://www.mapathon.com/ia.shtml