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Chelmsford, MA ZIP Codes

Chelmsford, Massachusetts has 2 ZIP codes: 2 for street addresses ( and ).

Your street decides which one you use.

Which Chelmsford ZIP code is my address in?

Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?

Chelmsford ZIP code map

ZIP code map of Chelmsford, MA2 ZIP code areas in Chelmsford: 01824, 01863. Dashed line: Chelmsford limits. Grey areas: neighboring towns.01824018630182401863WestfordNorth BillericaLowellCarlisleTyngsboroDracut0182401863WestfordLowellCarlisleTyngsboroDracut

Tap or point to an area to see its ZIP code.Full-size map

Dashed line: Chelmsford town limits.

Map: Census Bureau ZIP Code Tabulation Areas (2020) and county subdivision limits (2024).

All Chelmsford ZIP codes by type

ZIPType and post office or station
01824street delivery
Chelmsford
01863street delivery; mail may be addressed to North Chelmsford
North Chelmsford

Chelmsford ZIP code questions

What is the main ZIP code for Chelmsford?

01824, the ZIP code of the main Chelmsford post office at 45 Alpine Ln.

What county is Chelmsford in?

Middlesex County.

ZIP codes for towns near Chelmsford

Lowell, MA5 ZIP codes: 01850, 01851, 01852 and more · 4 milesBillerica, MA3 ZIP codes: 01821, 01862 and more · 6 milesDracut, MA1 ZIP code: 01826 · 7 milesTewksbury, MA1 ZIP code: 01876 · 7 milesTown of Andover, MA4 ZIP codes: 01810 and more · 11 milesNashua, NH5 ZIP codes: 03060, 03062, 03063 and more · 12 miles

More towns near Chelmsford: Lexington, Lawrence, Woburn, Methuen, North Andover, Salem, Waltham, Arlington, Medford.

Sources and last checked

USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.

Checked October 20, 2026. Sources · How we build our lists · Corrections