Zip code (zcta) To County Crosswalk
Maps Cenus zip-code tabulation areas to Counties
census.gov
Census Cartographic Boundary Files, 2018 vintage
The cartographic boundary files are simplified representations of selected
Monthly Retail Trade Report
Retail and Food Service sales volume, by months, since 1992
Demographics for California School Districts
Select tables of census data for California school districts
Tracts in San Diego County
census.gov-tracts-2017-sandiego-1
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US County Boundaries
US county boundaries 500k resolution.