NOTE: Gray indicates insufficient data or a suppressed estimate.
SNAP participation rates across Iowa zip codes exhibit considerable spatial heterogeneity, with several urban cores—particularly in the eastern part of the state near Dubuque and Davenport, as well as smaller cities like Waterloo—displaying pockets of 30–50% participation highlighted in yellow and green tones. Rural southern and western Iowa generally shows moderate usage in the 10–20% range, while many suburban and exurban zip codes surrounding Des Moines and in north-central Iowa register among the lowest rates at under 5%. The scattered gray areas indicating missing data appear concentrated in sparsely populated rural zip codes, likely reflecting suppressed estimates due to small sample sizes in the American Community Survey.
Data: U.S. Census Bureau, 2023 ACS
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