United States Census Bureau

The U.S. Census Bureau is the nation's leading provider of quality data about its people and economy. The Census Bureau has been rolling out datasets via APIs, providing programmatic access to demographic, economic, housing, and social statistics. The Census Data API supports queries across datasets including the American Community Survey, Decennial Census, Population Estimates, County Business Patterns, Economic Census, and International Trade, with data available at national, state, county, tract, and block group geographic levels.

United States Census Bureau publishes 7 APIs on the APIs.io network, including American Community Survey API, County Business Patterns API, Decennial Census API, and 4 more. Tagged areas include Demographics, Federal-Government, Open Data, Statistics, and Economics.

The United States Census Bureau catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

United States Census Bureau’s developer surface includes GitHub presence and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

33.2/100 thin ▬ flat Agent 25/100 agent aware Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0

AccessFreemium

9 APIs

Demographics Federal-Government Open Data Statistics EconomicsPopulation

Kin Score

Kin Score How this is scored →
scored 2026-08-21 · rubric v0.12.0

Composite quality — 33.2/100 · thin

Contract Quality 12.6 / 21

Developer Ergonomics 2.4 / 17

Access Clarity 0.0 / 17

Operational Transparency 1.5 / 11

Contract Governance 5.6 / 10

Discoverability 6.3 / 9

Regulatory Posture 3.1 / 15

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Regulatory Posture applies to this provider. Its tags matched the Government & Public Sector regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/united-states-census-bureau: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 9

Individual APIs this provider publishes, each with its own machine-readable definition.

Rate Limits 1

Documented rate limits and quota policies.

United States Census Bureau Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

Examples 3

Example request and response payloads for these APIs.

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

APIKeySignup

APIKeySignup

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub

GitHub

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Forums

Forums

Company 3

The organization behind the API

LinkedIn

Website

Website

Newsletter

Newsletter

Other 1

Properties that don't map to a standard resource type

DataExplorer

DataExplorer

Source (apis.yml)

aid: united-states-census-bureau
name: United States Census Bureau
description: The U.S. Census Bureau is the nation's leading provider of quality data about its people and economy. The Census
  Bureau has been rolling out datasets via APIs, providing programmatic access to demographic, economic, housing, and social
  statistics. The Census Data API supports queries across datasets including the American Community Survey, Decennial Census,
  Population Estimates, County Business Patterns, Economic Census, and International Trade, with data available at national,
  state, county, tract, and block group geographic levels.
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/united-states-census-bureau.png
url: https://raw.githubusercontent.com/api-evangelist/united-states-census-bureau/refs/heads/main/apis.yml
created: '2024-01-01'
modified: '2026-05-19'
specificationVersion: '0.23'
tags:
- Demographics
- Federal-Government
- Open Data
- Statistics
- Economics
- Population
tags_raw:
- Demographics
- Federal Government
- Open Data
- Statistics
- Economics
- Population
apis:
- aid: united-states-census-bureau:tigerweb-rest-api
  name: TIGERweb GeoServices REST API
  description: The TIGERweb GeoServices REST API provides access to Census Bureau geographic data including boundaries for
    states, counties, census tracts, block groups, and other geographic entities. Supports standard ArcGIS REST API queries
    for geographic features.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://tigerweb.geo.census.gov/tigerwebmain/TIGERweb_main.html
  baseURL: https://tigerweb.geo.census.gov/arcgis/rest/services
  tags:
  - Geography
  - GIS
  - Boundaries
  - Mapping
  properties:
  - type: Documentation
    url: https://tigerweb.geo.census.gov/tigerwebmain/TIGERweb_main.html
- aid: united-states-census-bureau:geocoding-api
  name: Census Geocoding Services
  description: The Census Geocoding Services convert addresses to geographic coordinates and census geography identifiers.
    Supports both single-address lookups and batch geocoding for large address lists.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://geocoding.geo.census.gov/geocoder/
  baseURL: https://geocoding.geo.census.gov/geocoder
  tags:
  - Geocoding
  - Geography
  - Address
  properties:
  - type: Documentation
    url: https://geocoding.geo.census.gov/geocoder/
  - type: BatchGeocoding
    url: https://www.census.gov/programs-surveys/geography/technical-documentation/complete-technical-documentation/census-geocoder.html
- aid: united-states-census-bureau:united-states-census-bureau-american-community-survey-api
  name: United States Census Bureau American Community Survey API
  description: ACS demographic, economic, social, and housing characteristics
  humanURL: https://www.census.gov/data/developers.html
  baseURL: https://api.census.gov/data
  tags:
  - American Community Survey
  properties:
  - type: OpenAPI
    url: openapi/united-states-census-bureau-american-community-survey-api-openapi.yml
  - type: Documentation
    url: https://www.census.gov/data/developers.html
  - type: APIKeySignup
    url: https://api.census.gov/data/key_signup.html
  - type: DataSets
    url: https://www.census.gov/data/developers/data-sets.html
  - type: DiscoveryTool
    url: https://www.census.gov/data/developers/updates/new-discovery-tool.html
  - type: UserGuide
    url: https://www.census.gov/data/developers/guidance/api-user-guide.html
  - type: ExampleQueries
    url: https://www.census.gov/data/developers/guidance/api-user-guide/example-api-queries.html
- aid: united-states-census-bureau:united-states-census-bureau-county-business-patterns-api
  name: United States Census Bureau County Business Patterns API
  description: Business establishment and employment data
  humanURL: https://www.census.gov/data/developers.html
  baseURL: https://api.census.gov/data
  tags:
  - County Business Patterns
  properties:
  - type: OpenAPI
    url: openapi/united-states-census-bureau-county-business-patterns-api-openapi.yml
  - type: Documentation
    url: https://www.census.gov/data/developers.html
  - type: APIKeySignup
    url: https://api.census.gov/data/key_signup.html
  - type: DataSets
    url: https://www.census.gov/data/developers/data-sets.html
  - type: DiscoveryTool
    url: https://www.census.gov/data/developers/updates/new-discovery-tool.html
  - type: UserGuide
    url: https://www.census.gov/data/developers/guidance/api-user-guide.html
  - type: ExampleQueries
    url: https://www.census.gov/data/developers/guidance/api-user-guide/example-api-queries.html
- aid: united-states-census-bureau:united-states-census-bureau-decennial-census-api
  name: United States Census Bureau Decennial Census API
  description: Decennial Census population and housing counts
  humanURL: https://www.census.gov/data/developers.html
  baseURL: https://api.census.gov/data
  tags:
  - Decennial Census
  properties:
  - type: OpenAPI
    url: openapi/united-states-census-bureau-decennial-census-api-openapi.yml
  - type: Documentation
    url: https://www.census.gov/data/developers.html
  - type: APIKeySignup
    url: https://api.census.gov/data/key_signup.html
  - type: DataSets
    url: https://www.census.gov/data/developers/data-sets.html
  - type: DiscoveryTool
    url: https://www.census.gov/data/developers/updates/new-discovery-tool.html
  - type: UserGuide
    url: https://www.census.gov/data/developers/guidance/api-user-guide.html
  - type: ExampleQueries
    url: https://www.census.gov/data/developers/guidance/api-user-guide/example-api-queries.html
- aid: united-states-census-bureau:united-states-census-bureau-economic-census-api
  name: United States Census Bureau Economic Census API
  description: Economic activity by industry and geography
  humanURL: https://www.census.gov/data/developers.html
  baseURL: https://api.census.gov/data
  tags:
  - Economic Census
  properties:
  - type: OpenAPI
    url: openapi/united-states-census-bureau-economic-census-api-openapi.yml
  - type: Documentation
    url: https://www.census.gov/data/developers.html
  - type: APIKeySignup
    url: https://api.census.gov/data/key_signup.html
  - type: DataSets
    url: https://www.census.gov/data/developers/data-sets.html
  - type: DiscoveryTool
    url: https://www.census.gov/data/developers/updates/new-discovery-tool.html
  - type: UserGuide
    url: https://www.census.gov/data/developers/guidance/api-user-guide.html
  - type: ExampleQueries
    url: https://www.census.gov/data/developers/guidance/api-user-guide/example-api-queries.html
- aid: united-states-census-bureau:united-states-census-bureau-geographic-services-api
  name: United States Census Bureau Geographic Services API
  description: Geocoding and geographic boundary services
  humanURL: https://www.census.gov/data/developers.html
  baseURL: https://api.census.gov/data
  tags:
  - Geographic Services
  properties:
  - type: OpenAPI
    url: openapi/united-states-census-bureau-geographic-services-api-openapi.yml
  - type: Documentation
    url: https://www.census.gov/data/developers.html
  - type: APIKeySignup
    url: https://api.census.gov/data/key_signup.html
  - type: DataSets
    url: https://www.census.gov/data/developers/data-sets.html
  - type: DiscoveryTool
    url: https://www.census.gov/data/developers/updates/new-discovery-tool.html
  - type: UserGuide
    url: https://www.census.gov/data/developers/guidance/api-user-guide.html
  - type: ExampleQueries
    url: https://www.census.gov/data/developers/guidance/api-user-guide/example-api-queries.html
- aid: united-states-census-bureau:united-states-census-bureau-international-api
  name: United States Census Bureau International API
  description: International demographic and trade data
  humanURL: https://www.census.gov/data/developers.html
  baseURL: https://api.census.gov/data
  tags:
  - International
  properties:
  - type: OpenAPI
    url: openapi/united-states-census-bureau-international-api-openapi.yml
  - type: Documentation
    url: https://www.census.gov/data/developers.html
  - type: APIKeySignup
    url: https://api.census.gov/data/key_signup.html
  - type: DataSets
    url: https://www.census.gov/data/developers/data-sets.html
  - type: DiscoveryTool
    url: https://www.census.gov/data/developers/updates/new-discovery-tool.html
  - type: UserGuide
    url: https://www.census.gov/data/developers/guidance/api-user-guide.html
  - type: ExampleQueries
    url: https://www.census.gov/data/developers/guidance/api-user-guide/example-api-queries.html
- aid: united-states-census-bureau:united-states-census-bureau-population-estimates-api
  name: United States Census Bureau Population Estimates API
  description: Annual population estimates and projections
  humanURL: https://www.census.gov/data/developers.html
  baseURL: https://api.census.gov/data
  tags:
  - Population Estimates
  properties:
  - type: OpenAPI
    url: openapi/united-states-census-bureau-population-estimates-api-openapi.yml
  - type: Documentation
    url: https://www.census.gov/data/developers.html
  - type: APIKeySignup
    url: https://api.census.gov/data/key_signup.html
  - type: DataSets
    url: https://www.census.gov/data/developers/data-sets.html
  - type: DiscoveryTool
    url: https://www.census.gov/data/developers/updates/new-discovery-tool.html
  - type: UserGuide
    url: https://www.census.gov/data/developers/guidance/api-user-guide.html
  - type: ExampleQueries
    url: https://www.census.gov/data/developers/guidance/api-user-guide/example-api-queries.html
common:
- type: AgenticAccess
  url: agentic-access/united-states-census-bureau-agentic-access.yml
- type: DomainSecurity
  url: security/united-states-census-bureau-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/us-census-bureau
- type: Website
  url: https://www.census.gov/
- type: DeveloperPortal
  url: https://www.census.gov/data/developers.html
- type: APIKeySignup
  url: https://api.census.gov/data/key_signup.html
- type: DataExplorer
  url: https://data.census.gov/
- type: GitHub
  url: https://github.com/uscensusbureau
- type: Forums
  url: https://apiforum.uscensusbureau.com/
- type: Newsletter
  url: https://public.govdelivery.com/accounts/USCENSUS/subscriber/new?topic_id=USCENSUS_11933
- type: LlmsText
  url: https://api.census.gov/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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