Figure 1.
Map showing population distribution in Iowa by ZIP code. All 935 ZIP codes in Iowa are shaded by population. Darker colors indicate larger populations while lighter colors indicate smaller populations.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.