Postal boundaries

California 4-digit ZIP boundaries

  • 341 boundary areas included
  • 9 data fields with sample values
  • Part of the USA 4-digit ZIP boundaries collection for California
Preview of California 4-digit ZIP boundaries map
Enlarged preview of California 4-digit ZIP boundaries map

California 4-digit ZIP boundaries Data Sample

Below is a sample of some of the fields included in this GIS file. These columns can be visualized in QGIS, Power BI, Leaflet, and other mapping or analytics tools supporting GeoJSON.

Field Name Sample Data
fid 338, 339, 340
ZIP4 0001, 0002, 0003
STATE CA, CA, CA
ZIP 00019, 00020, 00032
ZIP2 00, 00, 00
ZIP3 000, 000, 000
PO_NAME Lassen Ntl Forest, Sierra National Forest, Los Padres Ntl Forest
area_km 1068.6, 1066.8, 1455.1
CARTO_REGION State, State, State

Dataset information

About the California 4-digit ZIP boundaries GeoJSON file

  • Map ID: usa_zip4_boundaries_ca
  • Collection: USA 4-digit ZIP boundaries
  • Region: California
  • Boundary areas: 341
  • Attribute fields: 9
  • Preview generated: 9 August 2026

This postal boundary dataset contains 341 boundary areas and 9 data fields from the USA 4-digit ZIP boundaries collection for California.

£125.00
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Note on Compatibility

We strive to provide universally compatible GeoJSON files, but sometimes a mapping application may require a specific coordinate reference system (projection) or particular data fields. If your file doesn't load or display as expected, please get in touch. We can reproject the file, add additional data columns to the polygons, or even develop a custom mapping tool—whether simple or complex—to ensure your data visualizes correctly. We won't rest until everything works just the way you need!

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