Your ZIP Code's Food Access Score — USDA Data

Data source: ZipCheckup analysis of USDA Food Environment Atlas, County Health Rankings, CDC PLACES, SNAP participation data

The USDA doesn't just track what farmers grow. It tracks where Americans can't buy food. Through the Food Environment Atlas and related datasets, the federal government has mapped every food desert in the country — areas where residents lack reasonable access to fresh, affordable groceries.

ZipCheckup integrated this data across 38,834 ZIP codes. The results reveal a health crisis that follows geographic patterns with unsettling precision.

The National Picture

Nearly half of American ZIP codes have elevated food desert risk:

18,150 ZIP codes — 46.8% of the total — fall into the high or very high category. These are communities where food insecurity, limited supermarket access, and poor nutrition outcomes converge.

The national average food insecurity rate is 15.7%. Average SNAP participation is 13.0%. But in the worst-affected areas, these numbers are three times higher.

The Worst Food Deserts

The most severe food access problems cluster in predictable but devastating patterns:

Rural Louisiana leads the lower 48 with food insecurity rates above 46% — nearly half the population struggling to access adequate food. In ZIP 71254, the obesity rate hits 51.2% and diabetes reaches 22%. Nearly half of residents receive SNAP benefits.

Alabama's Black Belt region (ZIPs 36029, 36061, 36089) shows a similar pattern: 42.9% food insecurity, 24.6% diabetes, 51.3% obesity. These are among the highest diabetes rates in our entire dataset.

The South Bronx Anomaly

New York's food access data reveals something counterintuitive. ZIP codes in the South Bronx — 10451 through 10458 — have a food environment index of 0 (the worst possible score) despite being in the most densely populated city in America.

Food insecurity in the Bronx hits 37%. These ZIP codes are classified as very high risk not because supermarkets don't exist nearby, but because affordability, income, and access barriers create an effective food desert even in an urban environment.

This challenges the common assumption that food deserts are only a rural problem. The USDA's data shows they can exist anywhere poverty concentrates.

The 5,497 Crisis ZIP Codes

Across the dataset, 5,497 ZIP codes have food insecurity rates above 20% — meaning one in five residents doesn't have reliable access to adequate food. These crisis ZIPs are concentrated in:

• The Deep South — Louisiana, Mississippi, Alabama, Georgia
• Tribal lands — Remote Alaska, parts of the Dakotas and Southwest
• Appalachia — Eastern Kentucky, West Virginia, rural Virginia
• Urban poverty pockets — Bronx, Detroit, parts of Chicago and Philadelphia

Food Environment Index: What Zero Means

The USDA's Food Environment Index combines two factors: food insecurity rate and distance to nearest supermarket. The scale runs 0-10, where 0 is worst and 10 is best.

3,146 ZIP codes score below 3, indicating severe food access problems. The geographic distribution of zero-score ZIPs tells a striking story about environmental injustice: they overlap heavily with areas that also have poor water quality, aging infrastructure, and high environmental contamination.

The Health Cascade

Food desert data becomes particularly alarming when you look at health outcomes. Across our dataset:

Average obesity rate: 44.5% — but in very high food desert risk ZIPs, it climbs above 50%.

The progression is clear: limited food access leads to reliance on cheap, processed food. That drives obesity. Obesity drives diabetes, cardiovascular disease, and a cascade of health conditions that reduce life expectancy by years.

In ZIPs where food insecurity exceeds 40%, the average diabetes rate is over 20% — more than double the national average of about 9%.

Why ZipCheckup Tracks Food Access

Food access might seem unrelated to water quality — our core focus. But the data tells a different story. Communities with the worst food access tend to also have:

• Older water infrastructure (less tax revenue for maintenance)
• Higher rates of EPA violations (less political pressure for compliance)
• Greater exposure to environmental hazards (industrial siting patterns follow poverty)
• Lower rates of home water filtration (cost barriers)

When you look up your ZIP code on ZipCheckup, food desert risk is one piece of a larger environmental and health picture that includes water quality, lead exposure, flood risk, and air pollution.

Check Your ZIP

ZipCheckup combines USDA food access data with EPA water quality records, environmental justice indicators, and dozens of other community health metrics. Every number comes from federal data sources.

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