What is the difference between a food desert and a food swamp?

Numbers match the citations in the article. A working link isn't proof that a page supports a claim; check the quoted passage and date.

1. 1

   Food desert (Wikipedia)

   WikipediaPublished Oct 16, 2026Checked Oct 17, 2026

   “A food desert is an area that has limited access to affordable, fresh, healthy, and nutritious food. Food deserts are commonly paired with food swamps, which lack grocery stores and instead have convenience stores or fast food. In contrast, an area with greater access to grocers or farmers' markets with fresh foods may be called a food oasis. Food deserts are commonly associated with food insecurity and are linked to worsening health outcome including an increased risk of developing chronic diseases such as obesity, diabetes, and cardiovascular disease. In 2025, the United States Department of Agriculture reported that an estimated 12.8% of the US population were living in low-income and low-access census tracts. Of this number, 22 million people live in "food deserts", which they define as low-income census tracts that are more than 1 mile (1.6 kilometers) from a supermarket in urban or suburban areas and more than 10 miles (16 kilometers) from a supermarket in rural areas.”

2. 2

   Spatiotemporal trends in food deserts, food swamps and food environments around schools in Wallonia, Belgium (2008-2024).

   Archives of public health = Archives belges de sante publique (Cammue et al.)Published Jul 16, 2026Checked Oct 17, 2026

   “Temporal trends were evaluated using linear regression.ResultsBetween 2008 and 2024, approximately 11% of households lived in potential food deserts, with fewer than 2% residing in actual food deserts. In contrast, food swamps were widespread: in 2024, 52.2% of households were located in sectors where unhealthy outlets outnumbered healthy ones. Sectors with high proportions of elderly residents or children were disproportionately affected. Around secondary schools, traditional fresh food retailers declined substantially (fruit and vegetable stores - 60%), while takeaway and delivery outlets increased threefold. By 2024, over 90% of secondary schools were located in predominantly unhealthy food environments within walking distance.ConclusionsIn Wallonia, exposure to unhealthy food environments is widespread and persistent, particularly around schools and in socio-demographically vulnerable areas, while food deserts remain relatively rare. Policy efforts addressing the density and spatial distribution of unhealthy outlets may contribute to reducing dietary inequalities and improving population health.”

3. 3

   Measurement tools to assess the obesogenic environment in neighborhood: a scoping review.

   BMC public health (Pumsutas et al.)Published Nov 21, 2025Checked Oct 17, 2026

   “Sixty-four studies were cross-sectional design, with GIS commonly used for measurements (61.0%), followed by combined GIS and other tools (23%), and non-GIS (16%). Accessibility and availability of food and physical activity facilities were mostly identified (49%) such as density or proximity of food or physical activity facilities or calculated using the composite index such as Retail Food Environment Index (RFEI), along with infrastructure for walking, cycling, and transportation as walkability or Walk Score.ConclusionsThis scoping review summarizes tools and methods used to assess obesogenic environments at the neighborhood level. The review points to limited support for GIS tools in LMICs. Combining GIS with surveys and observational audits may help adapt assessment tools across diverse settings. These efforts could inform monitoring and guide actions addressing environmental contributors to non-communicable diseases.”

4. 4

   Mapping food access: how neighborhood deprivation shapes healthy food availability in the United Kingdom.

   BMC public health (Beydoun et al.)Published Feb 23, 2026Checked Oct 17, 2026

   “Food desert risk and deprivation were moderately correlated (r = 0.40, p < 0.001) but showed substantial spatial discordance. Nearly half (48.2%) of the most deprived areas were also in the highest food desert quartile, while about one-third showed discordant classifications. Deprivation showed a strong graded association with food desert risk (RRR per IMD quartile = 3.07; 95% CI: 2.98–3.16). Employment deprivation was the strongest predictor across nations, followed by education, housing/access to services, and living environment. Antagonistic employment–income interactions were observed. Rural areas with low deprivation but high food desert risk were especially evident in Scotland. Food desert risk and deprivation represent overlapping but distinct dimensions of structural disadvantage. Reliance on deprivation indices alone may miss communities with substantial food access barriers, particularly in rural settings. Integrating food environment metrics alongside deprivation measures may improve place-based policy targeting.”

5. 5

   Associations between food deserts, food swamps, and ultra-processed food intake in childhood.

   Revista paulista de pediatria : orgao oficial da Sociedade de Pediatria de Sao Paulo (Torre et al.)Published May 11, 2026Checked Oct 17, 2026

   “Food deserts and swamps were identified using the Brazilian methodology proposed by the Food and Nutrition Security Intersectoral Chamber, and the density of healthy and unhealthy food outlets per 10,000 inhabitants was calculated. The associations between food environments and consumption of ultra-processed foods were estimated using binary logistic regression, yielding odds ratios (OR) and respective 95% confidence intervals (95%CI) from a generalized estimating equations model.ResultsUltra-processed foods were part of the diet in 60.18% of the children, with sweetened beverages being the most prevalent (42.22%). Living in sectors classified as food swamps was positively and independently associated with consumption of instant noodles, packaged snacks, or crackers (OR 2.71; 95%CI 1.19-6.16) and stuffed cookies/sweets/candies (OR 2.50; 95%CI 1.03-6.12).ConclusionsChildren living in food swamps were more likely to consume ultra-processed foods. The results indicate the need to promote environments that favor healthy food choices among families and children through adequate nutrition, nutrition education, and policies that regulate access to and the advertising of unhealthy foods.”

6. 6

   Retail food environment assessments: a case study of consumer and community nutrition environment perspectives of Logan, Utah.

   BMC public health (Atoloye et al.)Published May 16, 2026Checked Oct 17, 2026

   “Kernel density analysis in ArcGIS Pro was used to assess the location, type, and healthfulness of different food retail outlets throughout Logan based on Consumer Nutrition Environment Scores (CNES).ResultsKey findings show that Logan's foodscape is dominated by fast-food and full-service restaurants, making up over half of all stores. Our study revealed significant variability in CNES across different store types and categories with supermarkets and healthy specialty stores scoring highest, an indication of a better consumer nutrition environment, while convenience stores with gas stations scoring lowest, reflecting poorer support for healthy choices. Healthy specialty stores had superior CNES at the store-category level.ConclusionWhile disparities exist in the availability of healthy food options across store types in Logan, the dominance of fast-food and full-service restaurants presents both challenges and opportunities to promote healthier options through partnerships and interventions.”