Zip code 01821: Billerica, Massachusetts

Q: What city is zip code 01821?

01821 is assigned to Billerica, Massachusetts. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What county is 01821 in?

01821 is in Middlesex County, Massachusetts.

Q: What is the population of 01821?

About 30,143 people live in 01821, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 01821?

The median household income in 01821 is $149,042.

Q: What zip codes are near 01821?

The closest zip codes to 01821 are 01822, 01865, 01866, 01862, 01730.

Residential delivery areaMiddlesex CountyEastern Time

Population

30,143

Median household income

$149K

U.S. $81K

Median home value

$615K

U.S. $333K

Median rent

$2,346/mo

U.S. $1,413

Median age

44.3

U.S. 38.9

Land area

17 sq mi

1,817 people/sq mi

Boundary is the Census Bureau's ZIP Code Tabulation Area, which closely tracks the postal delivery area.

About 01821

01821 is a suburban zip code in Billerica, Massachusetts (Middlesex County), covering 17 sq mi of land. About 30,143 people live here, or 1,817 per square mile. The median resident is 44.3 years old, compared with 38.9 nationally.

The median household earns $149,042 a year, 85% above the national median of $80,734. 5.3% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $615,100, or 4.1 years of median household income (U.S.: 4.1 years), which makes homes about as affordable as the national average for local earners. 82% of occupied homes are lived in by their owners, and renters pay a median of $2,346 a month.

40% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 25.9 minutes each way, and 20% of workers work from home. The most common jobs among working residents are in management; office and administrative support; and healthcare. 24% of households speak a language other than English at home, most often another Indo-European language such as French, German, Russian or Hindi.

How 01821 compares

Sorted from highest to lowest national percentile

Median household income$149,042
94th
StrengthU.S. $80,734 · MA $103,96088th of 503 in MA
Median gross rent$2,346
93rd
U.S. $1,413 · MA $1,76261st of 461 in MA
Median earnings per worker$70,889
87th
StrengthU.S. $49,666 · MA $62,095182nd of 519 in MA
Tech workers6.3%
87th
U.S. 3.8% · MA 4.9%110th of 520 in MA
Per capita income$61,572
86th
StrengthU.S. $44,673 · MA $57,897198th of 522 in MA
Median home value$615,100
83rd
U.S. $332,700 · MA $562,100196th of 506 in MA
Median age44.3
83rd
U.S. 38.9 · MA 40232nd of 522 in MA
Homeownership rate82.2%
83rd
StrengthU.S. 65.2% · MA 62.5%212th of 518 in MA
Broadband access95.7%
82nd
StrengthU.S. 91% · MA 92.8%171st of 518 in MA
Work from home20.1%
78th
U.S. 15.1% · MA 18.6%210th of 520 in MA
Residents 65 and older19.3%
69th
U.S. 17.2% · MA 17.9%264th of 522 in MA
Bachelor's degree or higher40.2%
66th
U.S. 35.7% · MA 47.3%330th of 521 in MA
Foreign-born residents15.4%
65th
U.S. 14.1% · MA 18%158th of 522 in MA
Population density1,817/sq mi
55th
U.S. 95/sq mi · MA 903/sq mi167th of 522 in MA
Population30,143
50th
U.S. 334,922,499 · MA 7,044,05660th of 522 in MA
Average commute25.9 min
49th
U.S. 26.4 min · MA 29.1 min352nd of 504 in MA
Government workers13.5%
48th
U.S. 14.5% · MA 12.7%236th of 520 in MA
Healthcare workers9.3%
47th
U.S. 9.7% · MA 10.3%311th of 520 in MA
Self-employed workers9.1%
47th
U.S. 10% · MA 8.8%264th of 520 in MA
Veterans4.8%
36th
U.S. 6.2% · MA 4.3%264th of 522 in MA
Diversity index36.4
31st
U.S. 61.4 · MA 52.7197th of 522 in MA
Unemployment rate3%
16th
StrengthU.S. 5.2% · MA 5.2%393rd of 520 in MA
Residents under 1817.4%
16th
U.S. 22% · MA 19.4%309th of 522 in MA
Rent-burdened renters39.5%
15th
StrengthU.S. 51.1% · MA 51.8%402nd of 506 in MA
Poverty rate5.3%
14th
StrengthU.S. 12.5% · MA 10%318th of 519 in MA
Income inequality (Gini)0.381
10th
StrengthU.S. 0.483 · MA 0.489438th of 517 in MA
Uninsured rate1.7%
4th
StrengthU.S. 8.4% · MA 2.6%267th of 521 in MA
Housing vacancy1%
1st
U.S. 10.1% · MA 8.1%480th of 519 in MA

Measure	01821	Middlesex	MA	U.S.	National percentile	Rank in MA
Median household incomeStrength	$149,042	$130,847	$103,960	$80,734	94th	88th of 503
Median gross rent	$2,346	$2,201	$1,762	$1,413	93rd	61st of 461
Median earnings per workerStrength	$70,889	$73,671	$62,095	$49,666	87th	182nd of 519
Tech workers	6.3%	7.8%	4.9%	3.8%	87th	110th of 520
Per capita incomeStrength	$61,572	$69,556	$57,897	$44,673	86th	198th of 522
Median home value	$615,100	$727,800	$562,100	$332,700	83rd	196th of 506
Median age	44.3	38.9	40	38.9	83rd	232nd of 522
Homeownership rateStrength	82.2%	61.3%	62.5%	65.2%	83rd	212th of 518
Broadband accessStrength	95.7%	94.7%	92.8%	91%	82nd	171st of 518
Work from home	20.1%	24.7%	18.6%	15.1%	78th	210th of 520
Residents 65 and older	19.3%	16.3%	17.9%	17.2%	69th	264th of 522
Bachelor's degree or higher	40.2%	59.5%	47.3%	35.7%	66th	330th of 521
Foreign-born residents	15.4%	23.1%	18%	14.1%	65th	158th of 522
Population density	1,817/sq mi	2,003/sq mi	903/sq mi	95/sq mi	55th	167th of 522
Population	30,143	1,638,365	7,044,056	334,922,499	50th	60th of 522
Average commute	25.9 min	29.9 min	29.1 min	26.4 min	49th	352nd of 504
Government workers	13.5%	10.8%	12.7%	14.5%	48th	236th of 520
Healthcare workers	9.3%	8.9%	10.3%	9.7%	47th	311th of 520
Self-employed workers	9.1%	8.7%	8.8%	10%	47th	264th of 520
Veterans	4.8%	3.3%	4.3%	6.2%	36th	264th of 522
Diversity index	36.4	54.3	52.7	61.4	31st	197th of 522
Unemployment rateStrength	3%	4.4%	5.2%	5.2%	16th	393rd of 520
Residents under 18	17.4%	19.5%	19.4%	22%	16th	309th of 522
Rent-burdened rentersStrength	39.5%	47.1%	51.8%	51.1%	15th	402nd of 506
Poverty rateStrength	5.3%	7.7%	10%	12.5%	14th	318th of 519
Income inequality (Gini)Strength	0.381	0.475	0.489	0.483	10th	438th of 517
Uninsured rateStrength	1.7%	2.4%	2.6%	8.4%	4th	267th of 521
Housing vacancy	1%	4.5%	8.1%	10.1%	1st	480th of 519

The percentile is the share of Americans who live in a zip code with a lower value, so the 50th percentile is typical. Rank 1 is the highest value in the state. Both include zip codes with at least 100 residents. Strengths and weaknesses mark measures in the best or worst fifth nationally, where higher or lower is clearly better (income, poverty, education, commute, broadband, insurance and similar). Measures like age or density are left unmarked.

People

Age

Under 5

13%

5–17

18–24

13%

25–34

13%

35–44

13%

45–54

17%

55–64

12%

65–74

75+

Median age

44.3

Under 18

17.4%

65 and over

19.3%

Race and ethnicity

White79%
Black3%
Hispanic4%
Asian10%
Native American0%
Pacific Islander0.0%
Other0.4%
Multiracial5%

Diversity index

36.4

U.S. 61.4

Foreign-born

15.4%

U.S. 14.1%

Born in state

71.5%

Language spoken at home (households)

English only

76%

Spanish

Other Indo-European

11%

Asian / Pacific

Other

Households

Households: 11,312
Average household size: 2.7
Family households: 72.3%
Married couples: 56.6%
Living alone: 16.8%
Veterans (of adults): 4.8%
Male / female: 49% / 51%

Income and poverty

Household income distribution

<$25k

$25–50k

$50–75k

$75–100k

$100–150k

18%

$150–200k

20%

$200k+

29%

Median household income

01821

$149,042

Middlesex Co.

$130,847

Massachusetts

$103,960

United States

$80,734

Per capita income

$61,572

U.S. $44,673

Poverty rate

5.3%

U.S. 12.5%

Households earning $150K+

49.2%

U.S. 23%

Income inequality (Gini)

0.381

U.S. 0.483

Housing

Median home value

01821

$615,100

Middlesex Co.

$727,800

Massachusetts

$562,100

United States

$332,700

Median gross rent

01821

$2,346

Middlesex Co.

$2,201

Massachusetts

$1,762

United States

$1,413

Types of housing

Single-family

82%

2–4 units

5–19 units

20+ units

11%

Mobile home

0.3%

Boat, RV, van

Housing units: 11,430
Owner-occupied: 82.2%
Vacant: 1%
Median year built: 1972
Median rooms: 6.5
Renters paying 30%+ of income: 39.5%
Renters paying 50%+ of income: 15.8%
Home value to income: 4.1× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

69%

Carpooled

Transit

Walked

Bicycle

Worked from home

20%

Other

Commute time (one way)

<10 min

10–19

33%

20–29

18%

30–44

26%

45–59

10%

60+

Average commute

25.9 min

U.S. 26.4 min

Unemployment

U.S. 5.2%

In labor force

71.9%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Management

14%

Office and admin

11%

Healthcare

Construction and repair

Business and finance

Engineering and science

Sales

Computer and math

Production

Cleaning and personal care

Education

Transportation and moving

Food service

Police and fire

Legal and social services

Arts, media and sports

Farming, fishing and forestry

Industries

Manufacturing

16%

Professional and technical services

15%

Health care and social assistance

13%

Retail

10%

Education

Construction

Public administration

Finance, insurance and real estate

Admin, support and management

Restaurants and hotels

Other services

Transportation, warehousing and utilities

Information

Arts and recreation

Wholesale

Agriculture and mining

0.3%

Median earnings per worker

$70,889

U.S. $49,666

Self-employed

9.1%

U.S. 10%

Government workers

13.5%

U.S. 14.5%

Nonprofit workers

9.7%

U.S. 8.8%

Median earnings by type of work

Type of work	01821	U.S.
Management, business, science and arts	$96,827	$74,888
Service	$29,092	$26,804
Sales and office	$51,978	$40,476
Construction and maintenance	$69,688	$49,199
Production and transportation	$44,492	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

High school

26%

Some college

17%

Associate's

11%

Bachelor's

26%

Graduate

15%

High school graduate or higher: 94.7%
Bachelor's degree or higher: 40.2%
Graduate or professional degree: 14.6%
Households with broadband: 95.7%
Cable, fiber or DSL: 85.2%
No internet access: 3.5%
Without health insurance: 1.7%
Limited-English households: 2.9%

Geography

City (USPS): Billerica
State: Massachusetts
County: Middlesex County
Center point: 42.5493° N, 71.2517° W
Land area: 17 sq mi
Water area: 0.4 sq mi
Time zone: Eastern Time (UTC-5, UTC-4 in summer)
Zip type: Residential delivery area

Cities and towns within this zip

Pinehurst (unincorporated)23% of zip

Census places overlapping the zip's area. Mail may use a different city name than the municipality.

Zip codes near 01821

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
01822	Billerica, MA · PO box	1.1 mi	—	—	—
01865	Nutting Lake, MA · PO box	1.2 mi	—	—	—
01866	Pinehurst, MA · PO box	1.8 mi	—	—	—
01862	North Billerica, MA	3 mi	12,129	$138,571	$586,200
01730	Bedford, MA	3.8 mi	14,707	$172,400	$898,500
01803	Burlington, MA	4.1 mi	26,274	$146,436	$740,600
01805	Burlington, MA · PO box	4.2 mi	—	—	—
01876	Tewksbury, MA	4.5 mi	31,004	$130,204	$577,000
01887	Wilmington, MA	4.6 mi	23,336	$168,152	$680,500
01741	Carlisle, MA	5.6 mi	5,239	$250,000+	$1,103,900
01824	Chelmsford, MA	6 mi	26,650	$140,050	$619,700
01731	Hanscom Afb, MA	6.1 mi	2,110	$104,688	—

Zip codes like 01821 elsewhere

Matched on income, home values, age, density, education, housing and commuting

Questions about 01821

What city is zip code 01821?

01821 is assigned to Billerica, Massachusetts. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 01821 in?

01821 is in Middlesex County, Massachusetts.

What is the population of 01821?

About 30,143 people live in 01821, according to the Census Bureau's American Community Survey.

What time zone is 01821 in?

01821 is in Eastern Time.

What is the median household income in 01821?

The median household income in 01821 is $149,042.

What zip codes are near 01821?

The closest zip codes to 01821 are 01822, 01865, 01866, 01862, 01730.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 01821, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.