Checked
County data
Zip Codes
Published by Technology Services, Department of · Updated 03/25/2025 · As needed
- Last updated
- 03/25/2025
- First published 06/29/2020
- Update frequency
- As needed
- Formats
- 4
- CSV, JSON, GeoJSON
- Coverage
- Montgomery County, Maryland
- County in Maryland
About this dataset
This dataset contains all zip codes in Montgomery County. Zip codes are the postal delivery areas defined by USPS. Zip codes with mailboxes only are not included.
Files and access
Links open the official government source
- CSV downloaddata.montgomerycountymd.govCSV
- JSON (SODA API)data.montgomerycountymd.govJSON
- GeoJSONdata.montgomerycountymd.govGeoJSON
- XMLdata.montgomerycountymd.govXML
API endpoint: https://data.montgomerycountymd.gov/resource/k8c6-cefu.json
Links open outside websites we do not control.
Frequently asked questions
- Who publishes Zip Codes?
- Technology Services, Department of, part of Montgomery County, Maryland, publishes this dataset on dataMontgomery.
- How often is it updated?
- The publisher lists the update frequency as as needed. The last update was on 03/25/2025.
- How do I download it?
- It is available as CSV, JSON, GeoJSON, XML. Use the links in Files and access, which open the official government source.
Source: dataMontgomery and Data.gov · Last updated 10/24/2026 · Listing only; the data stays with the publisher