HUD User Housing Data

The HUD User API provides U.S. Department of Housing and Urban Development data including Fair Market Rents (FMR) by area, Income Limits at 30/50/80% thresholds, USPS Crosswalk data mapping ZIP codes to census tracts, counties, CBSAs, and congressional districts, and Comprehensive Housing Affordability Strategy (CHAS) data. Authentication uses a free bearer token. Rate limited to 60 queries per minute.

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HUD User Housing Data

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What you can query

You can look up Fair Market Rents by county or metro area (fmr/data), retrieve income limits at 30%, 50%, and 80% thresholds by household size (il/data), and map ZIP codes to census tracts, counties, CBSAs, and congressional districts using the USPS crosswalk.

What you can do

  • Looking up Fair Market Rent by ZIP code for rental market analysis
  • Comparing income limits across metropolitan areas for affordable housing planning
  • Mapping ZIP codes to census tracts and counties using USPS crosswalk data
  • Analyzing residential vacancy rates from USPS delivery data
  • Researching housing affordability thresholds for community development
  • Building rental pricing tools with government benchmark data

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