Zip code 02139: Cambridge, Massachusetts

Q: What city is zip code 02139?

02139 is assigned to Cambridge, Massachusetts. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What county is 02139 in?

02139 is in Middlesex County, Massachusetts.

Q: What is the population of 02139?

About 40,033 people live in 02139, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 02139?

The median household income in 02139 is $134,586.

Q: What zip codes are near 02139?

The closest zip codes to 02139 are 02238, 02215, 02141, 02142, 02163.

Residential delivery areaMiddlesex CountyEastern Time

Population

40,033

Median household income

$135K

U.S. $81K

Median home value

$1.1M

U.S. $333K

Median rent

$2,691/mo

U.S. $1,413

Median age

U.S. 38.9

Land area

1.6 sq mi

25,795 people/sq mi

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

About 02139

02139 is a dense urban zip code in Cambridge, Massachusetts (Middlesex County), covering 1.6 sq mi of land. About 40,033 people live here, or 25,795 per square mile. The median resident is 30 years old, compared with 38.9 nationally.

The median household earns $134,586 a year, 67% above the national median of $80,734. 13% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $1,087,500, or 8.1 years of median household income (U.S.: 4.1 years), which makes homes relatively expensive for local earners. 32% of occupied homes are lived in by their owners, and renters pay a median of $2,691 a month.

80% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 24.4 minutes each way, and 28% of workers work from home; working from home is more common than any single way of commuting. The most common jobs among working residents are in education; engineering and science; and management. 39% of households speak a language other than English at home, most often an Asian or Pacific Island language.

How 02139 compares

Sorted from highest to lowest national percentile

Bachelor's degree or higher79.5%
99th
StrengthU.S. 35.7% · MA 47.3%43rd of 521 in MA
Population density25,795/sq mi
98th
U.S. 95/sq mi · MA 903/sq mi9th of 522 in MA
Median gross rent$2,691
97th
U.S. $1,413 · MA $1,76224th of 461 in MA
Tech workers10.7%
97th
U.S. 3.8% · MA 4.9%31st of 520 in MA
Median home value$1,087,500
96th
U.S. $332,700 · MA $562,10041st of 506 in MA
Per capita income$74,801
93rd
StrengthU.S. $44,673 · MA $57,897120th of 522 in MA
Work from home28.3%
93rd
U.S. 15.1% · MA 18.6%95th of 520 in MA
Median household income$134,586
91st
StrengthU.S. $80,734 · MA $103,960135th of 503 in MA
Median earnings per worker$73,988
90th
StrengthU.S. $49,666 · MA $62,095147th of 519 in MA
Diversity index66.7
87th
U.S. 61.4 · MA 52.733rd of 522 in MA
Foreign-born residents28.9%
86th
U.S. 14.1% · MA 18%46th of 522 in MA
Broadband access95.6%
81st
StrengthU.S. 91% · MA 92.8%180th of 518 in MA
Income inequality (Gini)0.480
81st
WeaknessU.S. 0.483 · MA 0.489102nd of 517 in MA
Population40,033
67th
U.S. 334,922,499 · MA 7,044,05627th of 522 in MA
Poverty rate13%
61st
U.S. 12.5% · MA 10%91st of 519 in MA
Housing vacancy6%
44th
U.S. 10.1% · MA 8.1%245th of 519 in MA
Average commute24.4 min
39th
U.S. 26.4 min · MA 29.1 min385th of 504 in MA
Unemployment rate4%
34th
U.S. 5.2% · MA 5.2%297th of 520 in MA
Rent-burdened renters44.1%
26th
U.S. 51.1% · MA 51.8%365th of 506 in MA
Healthcare workers7.2%
18th
U.S. 9.7% · MA 10.3%420th of 520 in MA
Residents 65 and older11.4%
15th
U.S. 17.2% · MA 17.9%480th of 522 in MA
Government workers9.2%
13th
U.S. 14.5% · MA 12.7%409th of 520 in MA
Homeownership rate32.2%
5th
WeaknessU.S. 65.2% · MA 62.5%481st of 518 in MA
Median age30
4th
U.S. 38.9 · MA 40500th of 522 in MA
Uninsured rate1.5%
3rd
StrengthU.S. 8.4% · MA 2.6%303rd of 521 in MA
Veterans1.4%
3rd
U.S. 6.2% · MA 4.3%491st of 522 in MA
Residents under 1811%
3rd
U.S. 22% · MA 19.4%453rd of 522 in MA
Self-employed workers4.6%
3rd
U.S. 10% · MA 8.8%472nd of 520 in MA

Measure	02139	Middlesex	MA	U.S.	National percentile	Rank in MA
Bachelor's degree or higherStrength	79.5%	59.5%	47.3%	35.7%	99th	43rd of 521
Population density	25,795/sq mi	2,003/sq mi	903/sq mi	95/sq mi	98th	9th of 522
Median gross rent	$2,691	$2,201	$1,762	$1,413	97th	24th of 461
Tech workers	10.7%	7.8%	4.9%	3.8%	97th	31st of 520
Median home value	$1,087,500	$727,800	$562,100	$332,700	96th	41st of 506
Per capita incomeStrength	$74,801	$69,556	$57,897	$44,673	93rd	120th of 522
Work from home	28.3%	24.7%	18.6%	15.1%	93rd	95th of 520
Median household incomeStrength	$134,586	$130,847	$103,960	$80,734	91st	135th of 503
Median earnings per workerStrength	$73,988	$73,671	$62,095	$49,666	90th	147th of 519
Diversity index	66.7	54.3	52.7	61.4	87th	33rd of 522
Foreign-born residents	28.9%	23.1%	18%	14.1%	86th	46th of 522
Broadband accessStrength	95.6%	94.7%	92.8%	91%	81st	180th of 518
Income inequality (Gini)Weakness	0.480	0.475	0.489	0.483	81st	102nd of 517
Population	40,033	1,638,365	7,044,056	334,922,499	67th	27th of 522
Poverty rate	13%	7.7%	10%	12.5%	61st	91st of 519
Housing vacancy	6%	4.5%	8.1%	10.1%	44th	245th of 519
Average commute	24.4 min	29.9 min	29.1 min	26.4 min	39th	385th of 504
Unemployment rate	4%	4.4%	5.2%	5.2%	34th	297th of 520
Rent-burdened renters	44.1%	47.1%	51.8%	51.1%	26th	365th of 506
Healthcare workers	7.2%	8.9%	10.3%	9.7%	18th	420th of 520
Residents 65 and older	11.4%	16.3%	17.9%	17.2%	15th	480th of 522
Government workers	9.2%	10.8%	12.7%	14.5%	13th	409th of 520
Homeownership rateWeakness	32.2%	61.3%	62.5%	65.2%	5th	481st of 518
Median age	30	38.9	40	38.9	4th	500th of 522
Uninsured rateStrength	1.5%	2.4%	2.6%	8.4%	3rd	303rd of 521
Veterans	1.4%	3.3%	4.3%	6.2%	3rd	491st of 522
Residents under 18	11%	19.5%	19.4%	22%	3rd	453rd of 522
Self-employed workers	4.6%	8.7%	8.8%	10%	3rd	472nd of 520

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

5–17

22%

18–24

29%

25–34

12%

35–44

45–54

55–64

65–74

75+

Median age

Under 18

11%

65 and over

11.4%

Race and ethnicity

White51%
Black11%
Hispanic9%
Asian22%
Native American0.1%
Pacific Islander0.1%
Other1%
Multiracial6%

Diversity index

66.7

U.S. 61.4

Foreign-born

28.9%

U.S. 14.1%

Born in state

29.8%

Language spoken at home (households)

English only

61%

Spanish

Other Indo-European

13%

Asian / Pacific

14%

Other

Households

Households: 16,012
Average household size: 2.1
Family households: 39.6%
Married couples: 28.7%
Living alone: 34%
Veterans (of adults): 1.4%
Male / female: 52% / 48%

Income and poverty

Household income distribution

<$25k

14%

$25–50k

$50–75k

$75–100k

$100–150k

16%

$150–200k

13%

$200k+

32%

Median household income

02139

$134,586

Middlesex Co.

$130,847

Massachusetts

$103,960

United States

$80,734

Per capita income

$74,801

U.S. $44,673

Poverty rate

13%

U.S. 12.5%

Households earning $150K+

45%

U.S. 23%

Income inequality (Gini)

0.480

U.S. 0.483

Housing

Median home value

02139

$1,087,500

Middlesex Co.

$727,800

Massachusetts

$562,100

United States

$332,700

Median gross rent

02139

$2,691

Middlesex Co.

$2,201

Massachusetts

$1,762

United States

$1,413

Types of housing

Single-family

16%

2–4 units

34%

5–19 units

27%

20+ units

24%

Mobile home

Boat, RV, van

Housing units: 17,034
Owner-occupied: 32.2%
Vacant: 6%
Median year built: 1939 or earlier
Median rooms: 4.3
Renters paying 30%+ of income: 44.1%
Renters paying 50%+ of income: 19.4%
Home value to income: 8.1× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

15%

Carpooled

Transit

20%

Walked

22%

Bicycle

11%

Worked from home

28%

Other

Commute time (one way)

<10 min

10–19

32%

20–29

24%

30–44

26%

45–59

60+

Average commute

24.4 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

Education

20%

Engineering and science

18%

Management

11%

Computer and math

11%

Business and finance

Healthcare

Office and admin

Sales

Legal and social services

Arts, media and sports

Cleaning and personal care

Food service

Construction and repair

Transportation and moving

Production

Police and fire

0.6%

Farming, fishing and forestry

0.0%

Industries

Education

31%

Professional and technical services

23%

Health care and social assistance

12%

Manufacturing

Finance, insurance and real estate

Retail

Information

Restaurants and hotels

Other services

Public administration

Construction

Transportation, warehousing and utilities

Admin, support and management

Arts and recreation

Wholesale

Agriculture and mining

0.2%

Median earnings per worker

$73,988

U.S. $49,666

Self-employed

4.6%

U.S. 10%

Government workers

9.2%

U.S. 14.5%

Nonprofit workers

35.6%

U.S. 8.8%

Median earnings by type of work

Type of work	02139	U.S.
Management, business, science and arts	$84,072	$74,888
Service	$26,185	$26,804
Sales and office	$51,400	$40,476
Construction and maintenance	$49,464	$49,199
Production and transportation	$36,648	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

High school

Some college

Associate's

Bachelor's

31%

Graduate

49%

High school graduate or higher: 95.2%
Bachelor's degree or higher: 79.5%
Graduate or professional degree: 49%
Households with broadband: 95.6%
Cable, fiber or DSL: 87.1%
No internet access: 3%
Without health insurance: 1.5%
Limited-English households: 5.3%

Geography

City (USPS): Cambridge
State: Massachusetts
County: Middlesex County
Center point: 42.3624° N, 71.1023° W
Land area: 1.6 sq mi
Water area: 0.2 sq mi
Time zone: Eastern Time (UTC-5, UTC-4 in summer)
Zip type: Residential delivery area

Cities and towns within this zip

Cambridge100% of zip

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

Zip codes near 02139

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
02238	Cambridge, MA · PO box	0.9 mi	—	—	—
02215	Boston, MA	1 mi	24,581	$72,095	$750,000
02141	Cambridge, MA	1.1 mi	14,517	$126,522	$868,100
02142	Cambridge, MA	1.1 mi	4,737	$147,723	$1,954,500
02163	Boston, MA	1.2 mi	1,817	$84,583	—
02143	Somerville, MA	1.3 mi	25,513	$130,753	$926,800
02134	Allston, MA	1.4 mi	17,667	$78,679	$657,300
02116	Boston, MA	1.5 mi	21,978	$126,496	$1,562,500
02199	Boston, MA	1.5 mi	1,292	$122,285	—
02115	Boston, MA	1.6 mi	29,705	$54,991	$945,100
02446	Brookline, MA	1.7 mi	31,310	$131,963	$1,181,500
02114	Boston, MA	1.8 mi	14,418	$132,210	$924,400

Zip codes like 02139 elsewhere

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

Questions about 02139

What city is zip code 02139?

02139 is assigned to Cambridge, Massachusetts. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 02139 in?

02139 is in Middlesex County, Massachusetts.

What is the population of 02139?

About 40,033 people live in 02139, according to the Census Bureau's American Community Survey.

What time zone is 02139 in?

02139 is in Eastern Time.

What is the median household income in 02139?

The median household income in 02139 is $134,586.

What zip codes are near 02139?

The closest zip codes to 02139 are 02238, 02215, 02141, 02142, 02163.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 02139, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.