Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/MA/CHELMSFORD

Chelmsford ZIP code, Massachusetts

The ZIP code for Chelmsford, MA is 01824, and its area codes are 978 and 351.

USPS city name
1 ZIP code
Population
26,650
Area codes
978, 351

NANPA lists no telephone rate centre for Chelmsford itself, so these are the area codes of the nearest one, Lowell (2.7 miles). A town on an area-code boundary can differ from its neighbour.

Chelmsford in numbers

About 26,650 people live in Chelmsford, in 9,877 households. The median household income is $140,050 a year, 35% above the Massachusetts median of $103,960 (US: $80,734). The median owner-occupied home is valued at $619,700 (10% above the Massachusetts median).

Population26,650Chelmsford26,650
Households9,877Chelmsford9,877
Median household income$140,050Chelmsford$140,050Massachusetts$103,960US $80,734
Median home value$619,700Chelmsford$619,700Massachusetts$562,100US $332,700

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the ZIP code addressed as Chelmsford. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Chelmsford

ZIP codes with the USPS city name Chelmsford
ZIP City Type Population Median income Median home
01824 Chelmsford , MA Standard 26,650 $140,050 $619,700

Map of Chelmsford ZIP codes

01824

The ZIP codes of Chelmsford, MA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Chelmsford

The nearest larger towns are Lowell (118,368 people, 3.8 mi), Lexington (34,295 people, 12 mi) and Woburn (41,939 people, 12 mi).

Towns near Chelmsford
TownPopulationDistance
Lowell 118,368 3.8 mi
Littleton Common 3,289 7.1 mi
Pinehurst 6,845 7.3 mi
Wilmington 23,336 9.9 mi
Burlington 26,274 9.9 mi
West Concord 5,876 9.9 mi
Andover 9,451 11.7 mi
Ayer 3,098 11.9 mi
Lexington 34,295 11.9 mi
Woburn 41,939 12.4 mi
Lawrence 88,736 12.4 mi
Maynard 10,712 12.5 mi
Hudson, NH 7,469 12.6 mi
Nashua, NH 91,294 12.9 mi

More nearby: every ZIP code in Middlesex County · Massachusetts ZIP codes

Cite this page

zipcodes.pro. “Chelmsford, MA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ma/chelmsford

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