In which county is ZIP code 01863 located?

ZIP 01863 is listed under Middlesex County, MA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 01863: North Chelmsford, MA

ZIP: 01863

County: Middlesex County

Coordinates: 42.63470, -71.39080

ZIP Type: Standard

Time Zone: Eastern Time (ET)

This profile provides an in-depth look at ZIP code 01863, serving North Chelmsford in MA. It lies in Middlesex County and supports delivery, planning, and address verification.

Primary City	North Chelmsford
ZIP Code	01863
County	Middlesex County
State	MA
Latitude / Longitude	42.63470, -71.39080
ZIP Type	Standard
Time Zone	Eastern Time (ET)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 01863 (not an exact boundary).

Geographic & Administrative Context

For mapping and verification, 01863 is commonly represented around 42.63470, -71.39080. These coordinates help identify the general area within Middlesex County, MA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 01863 for mail delivery and general location reference in Middlesex County, MA.

Some addresses near North Chelmsford may share this ZIP due to delivery routing and local service areas.

Related ZIP Codes (Nearby)

Explore other postal codes near North Chelmsford within MA.

Frequently Asked Questions

What is the primary city for ZIP code 01863?

The primary city for this ZIP code is North Chelmsford, located in MA.

In which county is 01863 located?

ZIP code 01863 is situated within Middlesex County, MA.

What are the coordinates for 01863?

The approximate center point is 42.63470 (Latitude) and -71.39080 (Longitude).

Is ZIP code 01863 active?

This page lists ZIP 01863 as Listed based on the latest refresh date shown above.

Does ZIP 01863 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08