ZIP Code 01824

01824 is one of Massachusetts's ZIP codes, delivering to addresses in Chelmsford, Middlesex County.

City: Chelmsford
County: Middlesex County
State: Massachusetts
Prefix: 018xx

Where this code sits

01824 is part of the 018xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Chelmsford.

Chelmsford Massachusetts ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 01824 delivers to without sharing its boundary.

ZIP codes nearest 01824

The ZIP codes whose reference points sit closest to 01824.
ZIP code	Distance	Delivers to
ZIP code 01851	3.0 mi	Lowell, MA
ZIP code 01862	3.5 mi	North Billerica, MA
ZIP code 01863	3.5 mi	North Chelmsford, MA
ZIP code 01853	3.5 mi	Lowell, MA
ZIP code 01854	4.1 mi	Lowell, MA
ZIP code 01852	4.2 mi	Lowell, MA
ZIP code 01886	4.3 mi	Westford, MA
ZIP code 01741	4.3 mi	Carlisle, MA

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 01824, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 01824. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.