Checked
County data
ZIPCODES
Published by Technology Services, Department of · Updated 09/27/2017 · As needed
- Last updated
- 09/27/2017
- First published 09/27/2017
- 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.
As this is geographic data, SHP and KMZ formats are available for download.
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/66en-gz3q.json
Links open outside websites we do not control.
Frequently asked questions
- Who publishes ZIPCODES?
- 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 09/27/2017.
- 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