Census Boundaries – Block Group

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API Information

Version:v1.1.0
Region:US
Used for:Supporting regional population analysis, policy planning, equity mapping, and survey design by integrating scalable census geographies into spatial tools and reporting environments.

Overview

The LightBox Census Boundaries – Block Group API delivers mid-level geographic boundaries as defined by the U.S. Census Bureau. Sitting between Census Tracts and Census Blocks in resolution, Block Groups offer a critical layer for demographic modeling, spatial sampling, and local market analysis. This API allows users to retrieve geometries by ID, access WKT-formatted polygons for integration into client-side or backend workflows, and overlay block group layers on interactive mapping interfaces through tile or bounding box queries.

Key Capabilities

  • ✓Query Census Block Groups using a unique geographic ID
  • ✓Retrieve boundary geometries as WKT for spatial analysis or map rendering
  • ✓Perform tile and bounding box queries to overlay block group boundaries in your preferred map control
  • ✓Seamlessly integrate mid-level census geographies into mapping, modeling, and reporting platforms

Scope

Geography Level

  • Census Block Group – mid-resolution census geography

Relationship

  • More granular than a Census Tract
  • More aggregated than a Census Block

Additional Information

Census Boundaries – Block Group Overview

Learn about the key features and use cases of the Census Boundaries – Block Group API.

Census Boundaries – Block Group Reference

Explore the technical details of the Census Boundaries – Block Group API endpoints.

Census Boundaries – Block Group Release Notes

View the latest updates and changes to the Census Boundaries – Block Group API.