Outline Map of Iowa
This map is a basic black and white map showing the county lines as its only details.
Source: Indiana State University

Iowa State Map
If you need a map that shows the major freeways in Iowa, this is it!
Source: World Sites Atlas

Annual Average Precipitation Map
This map shows the average annual rainfall in the state.
Source: Spatial Climate Analysis Service, Oregon State University

Iowa Maps
There are lots of different maps to choose from on this list depending upon what you're looking for.
Source: State of Iowa

Merriam Webster Atlas
This atlas page shows the Iowa state map and some quick facts. There is also a good explanation of the symbolism of the state flag.
Source: The New York Times and Merriam Webster