In which county is ZIP code 01851 located?

ZIP 01851 is listed under Middlesex County, MA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 01851: Lowell, MA

ZIP: 01851

County: Middlesex County

Coordinates: 42.63150, -71.33290

ZIP Type: Standard

Time Zone: Eastern Time (ET)

This profile provides an in-depth look at ZIP code 01851, serving Lowell in MA. It lies in Middlesex County and supports delivery, planning, and address verification.

Primary City	Lowell
ZIP Code	01851
County	Middlesex County
State	MA
Latitude / Longitude	42.63150, -71.33290
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 01851 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 01851 is approximately 42.63150 (latitude) and -71.33290 (longitude). This location sits within Middlesex County, contributing to regional planning across MA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 01851 for mail delivery and general location reference in Middlesex County, MA.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Lowell within MA.

Frequently Asked Questions

What is the primary city for ZIP code 01851?

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

In which county is 01851 located?

ZIP code 01851 is situated within Middlesex County, MA.

What are the coordinates for 01851?

The approximate center point is 42.63150 (Latitude) and -71.33290 (Longitude).

Is ZIP code 01851 active?

This page lists ZIP 01851 as Listed based on the latest refresh date shown above.

Does ZIP 01851 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