HUD - US Department of Housing and Urban Development

HUD User USPS ZIP Code Crosswalk API

Maps USPS ZIP codes to and from census tracts, counties, CBSAs, congressional districts, and county subdivisions. Supports geographic lookups and crosswalk queries for housing analysis.

GitHub

Documentation

📖
Documentation
https://www.huduser.gov/portal/dataset/uspszip-api.html
📖
Authentication
https://www.huduser.gov/hudapi/public/register

API entry from apis.yml

apis.yml Raw ↑ 
name: HUD User USPS ZIP Code Crosswalk API
description: Maps USPS ZIP codes to and from census tracts, counties, CBSAs, congressional districts,
  and county subdivisions. Supports geographic lookups and crosswalk queries for housing analysis.
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
humanURL: https://www.huduser.gov/portal/dataset/uspszip-api.html
baseURL: https://www.huduser.gov/hudapi/public/usps
tags:
- ZIP Code
- Crosswalk
- Geography
- Census
properties:
- type: Documentation
  url: https://www.huduser.gov/portal/dataset/uspszip-api.html
- type: Authentication
  url: https://www.huduser.gov/hudapi/public/register