Census Data API

U.S. Census Bureau Data API at api.census.gov serving approximately 1,784 datasets across major survey programs — Decennial Census, American Community Survey (ACS 1-year and 5-year), Population Estimates Program (PEP), Current Population Survey (CPS), Survey of Income and Program Participation (SIPP), County Business Patterns (CBP), Economic Census, International Trade, and more. API key obtained via Census Bureau registration.

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/census-data-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑
name: Census Data API
description: U.S. Census Bureau Data API at api.census.gov serving approximately 1,784 datasets across
  major survey programs — Decennial Census, American Community Survey (ACS 1-year and 5-year), Population
  Estimates Program (PEP), Current Population Survey (CPS), Survey of Income and Program Participation
  (SIPP), County Business Patterns (CBP), Economic Census, International Trade, and more. API key obtained
  via Census Bureau registration.
humanURL: https://www.census.gov/data/developers.html
baseURL: https://api.census.gov/data
tags:
- Federal
- Census
- Demographics
- ACS
- Economic
properties:
- type: Portal
  url: https://www.census.gov/data/developers.html
- type: Catalog
  url: https://api.census.gov/data.html
- type: Signup
  url: https://api.census.gov/data/key_signup.html
- type: GitHubOrganization
  url: https://github.com/uscensusbureau