Iowa Maps & Geography

Geographic Names Information System
The Geographic Names Information System (GNIS), developed by the USGS in cooperation with the U.S. Board on Geographic Names (BGN), contains information about almost 2 million physical and cultural geographic features in the United States. This site is searchable.

Iowa Counties
Map of Iowa from the U.S.Census Bureau. Includes U.S. Census data for each county.

State Data Center of Iowa
Census maps of Iowa and much more from the State Library of Iowa website.