Geographic Resources Lists and Geographic Codes Census Bureau Code Lists: A variety of FIPS codes are available for download, including counties, places and townships, among others. BEA County FIPS Codes: A comprehensive list of the county definitions and modifications used by the U.S. Bureau of Economic Analysis. Metropolitan and Micropolitan Delineation Files (Census Bureau): Includes current and historical definitions for core-based statistical areas, metropolitan divisions and combined statistical areas. Economic Development Districts (EDDs) as of August 2019 (StatsAmerica): These federally recognized EDDs are designated by the U.S. Economic Development Administration. Shapefiles for Mapping TIGER/Line Shapefiles (Census Bureau): These files cover numerous geographies at the national, statewide and county levels. TIGERweb: This interactive web map is a simple way to view TIGER/Line data without having to download it. Cartographic Boundary Files (Census Bureau): Simplified representations of selected TIGER data for use in small-scale thematic mapping. The National Map (U.S. Geological Survey) Geospatial Data Gateway: Environmental and natural resources data National Historical Geographic Information System: Provides free census data and boundary files for the U.S. dating back to 1790. U.S. Congressional District Shapefiles (UCLA): Historical boundaries for every U.S. congressional district between 1789 and 2012. Bridge Files USPS ZIP Code Crosswalk Files (HUD): These crosswalk files, which link ZIP Codes to multiple different geographies—from census tracts to congressional districts—are updated quarterly. ZIP Code Tabulation Area to County Bridge (StatsAmerica): ZIP Code Tabulation Areas (ZCTAs) were assigned to both Census and BEA counties based on population-weighted ZCTA centroids. This bridge is based on TIGER 2018 shapefiles from the U.S. Census Bureau, and the centroids were weighted based on Census 2010 block-level population. Geocorr Geographic Correspondence Engine (Missouri Census Data Center): Generate your own crosswalk files for dozens of geographic layers, complete with the ability to weight by population, land area or housing units. Related Links U.S. State Map Collection (GISGeography.com): Collection of printable reference maps for each state. Census Geography Program List of Substantial County Changes since 1970 (Census Bureau) Geographic Boundary Change Notes (Census Bureau)