Chelmsford ZIP Code List — Middlesex County, MA

There is one unique ZIP code in Chelmsford, Massachusetts and it is 01824. Area code: 978/781.

ZIP codes

18.06

sq mi land

0.39

sq mi water

978/781

area code

Chelmsford, MA ZIP code map

About Chelmsford, MA

Chelmsford, Massachusetts, is a charming town located in Middlesex County. Known for its rich history and welcoming atmosphere, the town offers a blend of suburban comfort and access to urban amenities. Residents and visitors alike enjoy its community spirit and recreational opportunities.

Location & geography

Chelmsford is situated approximately 25 miles northwest of Boston, making it an ideal location for those commuting to the city. It shares borders with several neighboring towns, including Westford to the west, Tyngsborough to the north, and Billerica to the south. The town covers a land area of 18.06 square miles and includes a water area of 0.39 square miles, featuring a mix of rolling terrain and scenic waterways.

Community & economy

The character of Chelmsford is marked by its friendly neighborhoods and active community engagements. The town has a diversified economy with industries ranging from technology to retail, contributing to the overall vibrancy of daily life. Residents enjoy various recreational activities, parks, and community events that foster a strong sense of belonging.

Transportation

Chelmsford is conveniently located near major highways, including Route 3 and Interstate 495, providing easy access to surrounding areas. The nearest airport is the Laurence G. Hanscom Field, located approximately 15 miles away, offering both commercial and private flight options. Public transportation is available, enhancing mobility for residents without personal vehicles.

History

Founded in the early 18th century, Chelmsford has a storied past, with key industries historically centered on agriculture and manufacturing. A notable event in its history includes the establishment of the Chelmsford Historical Society, which preserves the town’s rich heritage. Today, the town celebrates its roots while continuing to develop and grow.

Did you know?

One surprising fact about Chelmsford is that it was incorporated in 1655, making it one of the older settlements in the region. Additionally, the town hosts several historic sites, including the Chelmsford Public Library, which is located in a building that used to serve as the town hall.

ZIP codes for Chelmsford, MA (1)

ZIP code	City	County	Map
01824	Chelmsford	Middlesex	View map

Demographics & statistics

26,612

Population

43.6

Median age

$137,778

Median household income

$58,722

Per capita income

$547,800

Median home value

$2,010

Median monthly rent

82.2%

Home ownership

5.3%

Poverty rate

5.4%

Unemployment

8,514

Housing units

56.5%

Bachelor's or higher

Age distribution

Male Female

725

Under 5

763

872

5–9

918

706

10–14

744

689

15–19

725

788

20–24

829

1,315

25–34

1,385

1,586

35–44

1,669

2,032

45–54

2,138

1,044

55–59

1,099

885

60–64

932

1,380

65–74

1,453

724

75–84

763

218

85+

230

← Male

Female →

Age summary

Group	Count	%
Under 18	5,570	20.9%
18 and over	21,042	79.1%
65 and over	4,768	17.9%
Median age	43.6 years

Race & ethnicity

White 77.8%

Asian 8.3%

Hispanic or Latino 5.3%

Two or more races 5.2%

Black or African American 1.7%

Other race 1.6%

American Indian / Alaska Native 0.1%

Group	Count	%
White	21,871	77.8%
Asian	2,321	8.3%
Hispanic or Latino	1,497	5.3%
Two or more races	1,455	5.2%
Black or African American	486	1.7%
Other race	454	1.6%
American Indian / Alaska Native	25	0.1%

Household income

Under $10k 2.7%

$10k–$15k 1.3%

$15k–$25k 4.3%

$25k–$35k 4.1%

$35k–$50k 4.1%

$50k–$75k 9.7%

$75k–$100k 11.0%

$100k–$150k 16.1%

$150k–$200k 16.3%

$200k+ 30.5%

Range	% of households
Under $10k	2.7%
$10k–$15k	1.3%
$15k–$25k	4.3%
$25k–$35k	4.1%
$35k–$50k	4.1%
$50k–$75k	9.7%
$75k–$100k	11.0%
$100k–$150k	16.1%
$150k–$200k	16.3%
$200k+	30.5%
Median income	$137,778

Housing

Home values

Under $50k 1.4%

$50k–$100k 2.3%

$100k–$150k 0.3%

$150k–$200k 0.4%

$200k–$300k 3.7%

$300k–$500k 33.3%

$500k–$1M 57.2%

$1M+ 1.3%

Housing overview

Metric	Value
Median home value	$547,800
Median rent / month	$2,010
Owner occupied	82.2%
Renter occupied	17.8%
Vacant	3.6%
Single-family detached	72.9%
Large apartment buildings	10.2%
Mobile homes	1.8%
Median rooms	6.7
Avg household size (owned)	2.86

Year built

Era	%
2020 or later	0.2%
2010–2019	3.9%
2000–2009	5.1%
1990–1999	7.5%
1980–1989	10.8%
1970–1979	12.8%
1960–1969	29.4%
1950–1959	14.2%
1940–1949	2.0%
1939 or earlier	14.1%

Bedrooms

Size	% of units
No bedroom (studio)	2.2%
1 bedroom	4.3%
2 bedrooms	19.6%
3 bedrooms	39.4%
4 bedrooms	26.3%
5+ bedrooms	8.4%

Vehicles per household

Vehicles	% of households
No vehicle	3.3%
1 vehicle	23.8%
2 vehicles	47.0%
3 or more	26.0%

Heating fuel

Fuel type	%
Utility gas	76.2%
Electricity	10.9%
Propane / LP gas	2.3%
Fuel oil	8.9%
Wood	0.2%
Solar	0.2%
No fuel used	0.4%

Households & families

Household type	Count	%
Married-couple family	6,417	64.8%
Cohabiting couple	468	4.7%
Male householder, no spouse	1,027	10.4%
Female householder, no spouse	1,998	20.2%
Households with children under 18	3,059	30.9%
Households with seniors (65+)	3,274	33.0%
Average household size	2.67

Marital status

Status	Male	Female
Never married	28.3%	25.8%
Married	64.3%	57.6%
Separated	0.4%	1.7%
Widowed	2.1%	7.6%
Divorced	4.9%	7.1%

Education

Less than 9th grade 1.4%

Some HS, no diploma 2.8%

HS graduate 15.8%

Some college, no degree 14.1%

Associate's degree 9.4%

Bachelor's degree 31.1%

Graduate / professional 25.4%

Metric	%
HS diploma or higher	95.9%
Bachelor's or higher	56.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	427	7.1%
Kindergarten	342	5.7%
Elementary school	2,596	42.9%
High school	1,224	20.2%
College / grad school	1,463	24.2%

Employment

Industry of employment

Education & healthcare 24.0%

Professional & management 20.7%

Manufacturing 16.0%

Retail trade 9.5%

Construction 5.2%

Finance & real estate 5.1%

Information 4.1%

Public administration 3.7%

Arts, food & hospitality 3.5%

Transportation & utilities 3.0%

Wholesale trade 2.9%

Other services 2.3%

Occupation

Category	%
Management, business & arts	63.8%
Service	8.0%
Sales & office	18.2%
Natural resources & construction	4.9%
Production & transportation	5.2%

Employment type

Type	%
Private sector	82.4%
Government	15.0%
Self-employed	2.7%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	71.1%
Carpool	3.9%
Public transit	1.7%
Walk	1.2%
Other means	1.2%
Avg commute (minutes)	28.9

Poverty

All people 5.3%

Under 18 years 5.0%

18 and over 5.3%

Married-couple families 0.8%

Female-led households 22.2%

Income support

Source	% of households
Social Security	29.2%
Retirement income	23.7%
Supplemental Security	5.1%
Cash public assistance	1.7%
Food stamps / SNAP	6.6%

Health indicators

Condition	%
High blood pressure	27.2%
High cholesterol	30.9%
Heart disease	5.0%
Stroke	2.2%
Asthma	9.4%
Arthritis	21.8%
Kidney disease	2.4%
Pulmonary disease	4.2%
Cancer	7.7%

Behavior / access	%
Binge drinking	16.0%
No physical activity	14.3%
Less than 7 hrs sleep	26.9%
Fair or poor health	7.5%
Poor mental health	11.2%
Poor physical health	6.7%
No health insurance	4.3%
Visited doctor (checkup)	77.3%
Visited dentist	79.2%
Cholesterol screening	93.7%
Teeth loss	7.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,067	5.1%

Disability	%
Any disability	10.6%
Under 18	3.9%
18–64 years	8.7%
65 and over	25.1%

Health insurance coverage

Type	%
Private insurance	84.5%
Public insurance	27.8%
Uninsured under 19	0.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	25,124	94.4%
Spanish	808	3.2%
Other Indo-European	108	0.4%
Asian & Pacific Islander	312	1.2%
Other languages	344	1.4%

Place of birth & citizenship

Origin	Count	%
Native born (US)	23,322	87.6%
Born in same state	23,103	86.8%
Born in different state	17,825	67.0%
Foreign born	219	0.8%
Naturalized citizen	3,290	12.4%
Not a US citizen	1,980	60.2%

Ancestry

Ancestry	Count	%
Italian	6,387	24%
French	3,379	12.7%
Arab	1,285	4.8%
German	1,174	4.4%
English	222	0.8%

Ancestry	Count	%
Irish	174	0.7%
Norwegian	130	0.5%
Polish	111	0.4%
Dutch	21	0.1%

Technology access

Metric	% of households
Computer access	37.2%
Internet access	97.1%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What is the ZIP code for Chelmsford, MA?

Chelmsford, MA has one ZIP code: 01824.

What is the main ZIP code for Chelmsford, MA?

The primary ZIP code for Chelmsford, MA is 01824. The city uses area code 978 or 781 for phone service.

What county is Chelmsford, MA in?

Chelmsford is located in Middlesex County, Massachusetts.

How many ZIP codes are in Chelmsford, MA?

Chelmsford, MA has 1 ZIP code.

What ZIP code covers the downtown Chelmsford area near the Town Common?

Downtown Chelmsford, including the area around the historic Town Common and civic buildings, is located in ZIP code 01824.

Which ZIP code should I use for mailing packages to businesses in the Chelmsford Industrial Park?

The Chelmsford Industrial Park and surrounding commercial areas all use ZIP code 01824 for mail delivery.