Postal boundaries

Maryland ZIP code boundaries

  • 413 boundary areas included
  • 9 data fields with sample values
  • Part of the USA ZIP code boundaries collection for Maryland
Preview of Maryland ZIP code boundaries map
Enlarged preview of Maryland ZIP code boundaries map

Maryland ZIP code 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 3618, 3619, 3620
ZIP 21502, 21520, 21521
STATE MD, MD, MD
ZIP4 2150, 2152, 2152
ZIP2 21, 21, 21
ZIP3 215, 215, 215
PO_NAME Cumberland, Accident, Barton
area_km 253.9, 145.7, 68.9
CARTO_REGION State, State, State

Dataset information

About the Maryland ZIP code boundaries GeoJSON file

  • Map ID: usa_zip_boundaries_md
  • Collection: USA ZIP code boundaries
  • Region: Maryland
  • Boundary areas: 413
  • Attribute fields: 9
  • Preview generated: 9 August 2026

This postal boundary dataset contains 413 boundary areas and 9 data fields from the USA ZIP code boundaries collection for Maryland.

£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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