NOTE: Gray indicates insufficient data or a suppressed estimate.
The vast majority of Iowa's zip codes report non-Hispanic white population shares above 90%, with the yellow-dominant landscape reflecting the state's overall demographic homogeneity, particularly across rural areas in the northern, western, and southern portions of the state. Notable exceptions cluster around major urban centers—Des Moines, Waterloo/Cedar Falls, Iowa City, Davenport, and Sioux City—where zip codes drop to 40–70% non-Hispanic white, appearing as teal and green pockets against the surrounding yellow. The northwest corner of the state also displays modestly lower percentages in several zip codes, likely corresponding to meatpacking and agricultural communities with growing Hispanic and immigrant populations.
Data: U.S. Census Bureau, 2023 ACS
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