Postal boundaries

Maryland 3-digit ZIP boundaries

  • 14 boundary areas included
  • 9 data fields with sample values
  • Part of the USA 3-digit ZIP boundaries collection for Maryland
Preview of Maryland 3-digit ZIP boundaries map
Enlarged preview of Maryland 3-digit ZIP boundaries map

Maryland 3-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 356, 357, 358
ZIP3 001, 206, 207
STATE MD, MD, MD
ZIP 00152, 20609, 20744
ZIP2 0, 20, 20
ZIP4 15, 2060, 2074
PO_NAME Assateague Island Ntl SE, Avenue, Fort Washington
area_km 29.6, 35.4, 87
CARTO_REGION State, State, State

Dataset information

About the Maryland 3-digit ZIP boundaries GeoJSON file

  • Map ID: usa_zip3_boundaries_md
  • Collection: USA 3-digit ZIP boundaries
  • Region: Maryland
  • Boundary areas: 14
  • Attribute fields: 9
  • Preview generated: 9 August 2026

This postal boundary dataset contains 14 boundary areas and 9 data fields from the USA 3-digit ZIP boundaries collection for Maryland.

£85.00
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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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