U.S. Census Geographic Boundaries and Crosswalks

This dataset contains many files; use the Tree view below to get a condensed overview of what is available. This dataset provides harmonized geographic boundary shapefiles and crosswalks sourced from the U.S. Census Bureau and accessed via the pygris Python library. It includes: ZCTA (ZIP Code Tabulation Area) shapefiles County shapefiles ZCTA-to-county crosswalk files Unique lists of ZCTAs and counties by year Shapefiles: The column names and column types are harmonized for consistency across years. The cartographic boundaries are selected across years enabling longitudinal spatial analysis and integration with external datasets such as demographic or health data. Crosswalks are fetched directly from U.S. Census sources and processed to ensure compatibility and ease of use. All files are structured to support reproducible, year-over-year spatial analyses.