02140 ZIP Code — Cambridge, MA

Middlesex County, Massachusetts

ZIP code 02140 is located in Cambridge, Massachusetts, within Middlesex County. It covers approximately 1.16 square miles and serves a population of 21,553 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 617.

About ZIP code 02140

The housing stock consists of a significant share of large multi-unit buildings. Most homes were built in the pre-1940, giving the area an established character. Median home value is $994,800. Renters make up the majority at 64%, typical of denser urban areas.

The gap between median ($137,792) and mean household income suggests income inequality — a small number of higher earners pull the average up.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 31 minutes is near the national average. Remote work is prevalent — 26% of workers work from home.

Educational attainment is high — 80% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 02140 reflects a community defined by a highly educated population and a high rate of remote workers.

21,553

population

1.16

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

02140 ZIP code map

Cities in ZIP code 02140

Below are the cities the US Postal Service accepts for ZIP code 02140. Using any city not on this list may result in mail delivery delays.

City	Status
Cambridge	Acceptable
Cambridge	Preferred

Nearby ZIP codes

02138 Cambridge (0.9 mi) 02163 Boston (1.8 mi) 02163 Boston (1.8 mi) 02134 Allston (2.5 mi) 02139 Cambridge (2.6 mi) 02141 Cambridge (3.2 mi) 02135 Brighton (3.2 mi) 02142 Cambridge (3.5 mi) 02215 Boston (3.6 mi) 02129 Charlestown (3.7 mi) 02133 Boston (3.8 mi) 01890 Winchester (4 mi)

Demographics updated 06/2026

Population
Total population	21,553
Population density	18,580 / sq mi
State FIPS	25
County FIPS	017

Geography
Land area	1.16 sq mi
Water area	0.02 sq mi
Latitude	42.3933
Longitude	-71.1345
Timezone	Eastern (ET)
Area code	617

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	25.1%	23.8%	31.3%
$50k – $100k	18.8%	23.1%	25.9%
$100k – $200k	32.2%	32.1%	28.5%
Over $200k	23.8%	20.9%	14.3%

Demographics & statistics

21,553

Population

18,580

People per sq mi

34.7

Median age

$137,792

Median household income

$83,541

Per capita income

$994,800

Median home value

$2,566

Median monthly rent

35.7%

Home ownership

10.5%

Poverty rate

2.8%

Unemployment

4,420

Housing units

79.6%

Bachelor's or higher

Age distribution

Male Female

446

Under 5

451

441

5–9

447

335

10–14

340

470

15–19

477

878

20–24

890

2,867

25–34

2,905

1,697

35–44

1,719

1,077

45–54

1,092

612

55–59

621

506

60–64

513

787

65–74

797

441

75–84

447

148

85+

149

← Male

Female →

Age summary

Group	Count	%
Under 18	3,157	14.6%
18 and over	18,396	85.4%
65 and over	2,769	12.8%
Median age	34.7 years

Race & ethnicity

White 54.8%

Asian 17.6%

Black or African American 14.7%

Two or more races 6.5%

Hispanic or Latino 4.9%

Other race 1.4%

Group	Count	%
White	12,417	54.8%
Asian	3,977	17.6%
Black or African American	3,339	14.7%
Two or more races	1,483	6.5%
Hispanic or Latino	1,100	4.9%
Other race	319	1.4%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	25.1%	23.8%	31.3%
$50k – $100k	18.8%	23.1%	25.9%
$100k – $200k	32.2%	32.1%	28.5%
Over $200k	23.8%	20.9%	14.3%

Under $10k 4.0%

$10k–$15k 1.9%

$15k–$25k 3.8%

$25k–$35k 3.4%

$35k–$50k 6.1%

$50k–$75k 9.1%

$75k–$100k 8.5%

$100k–$150k 16.7%

$150k–$200k 14.1%

$200k+ 32.4%

Range	% of households
Under $10k	4.0%
$10k–$15k	1.9%
$15k–$25k	3.8%
$25k–$35k	3.4%
$35k–$50k	6.1%
$50k–$75k	9.1%
$75k–$100k	8.5%
$100k–$150k	16.7%
$150k–$200k	14.1%
$200k+	32.4%
Median income	$137,792

Housing

Home values

$50k–$100k 0.1%

$150k–$200k 1.5%

$200k–$300k 1.5%

$300k–$500k 5.0%

$500k–$1M 42.4%

$1M+ 49.4%

Housing overview

Metric	Value
Median home value	$994,800
Median rent / month	$2,566
Owner occupied	35.7%
Renter occupied	64.3%
Vacant	8.0%
Single-family detached	11.5%
Large apartment buildings	37.8%
Mobile homes	0.0%
Median rooms	4.2
Avg household size (owned)	2.37

Year built

Era	%
2020 or later	0.1%
2010–2019	16.8%
2000–2009	5.9%
1990–1999	5.0%
1980–1989	6.5%
1970–1979	8.8%
1960–1969	4.7%
1950–1959	3.2%
1940–1949	2.5%
1939 or earlier	46.4%

Bedrooms

Size	% of units
No bedroom (studio)	6.1%
1 bedroom	28.9%
2 bedrooms	36.8%
3 bedrooms	17.1%
4 bedrooms	7.6%
5+ bedrooms	3.6%

Vehicles per household

Vehicles	% of households
No vehicle	21.2%
1 vehicle	54.8%
2 vehicles	20.9%
3 or more	3.1%

Heating fuel

Fuel type	%
Utility gas	69.4%
Electricity	20.6%
Propane / LP gas	2.0%
Fuel oil	4.2%
Solar	0.1%
No fuel used	2.8%

Households & families

Household type	Count	%
Married-couple family	3,471	34.9%
Cohabiting couple	1,062	10.7%
Male householder, no spouse	2,348	23.6%
Female householder, no spouse	3,068	30.8%
Households with children under 18	1,949	19.6%
Households with seniors (65+)	2,167	21.8%
Average household size	2.16

Marital status

Status	Male	Female
Never married	50.6%	47.8%
Married	41.2%	39.7%
Separated	1.2%	0.6%
Widowed	1.7%	4.5%
Divorced	5.3%	7.3%

Education

Less than 9th grade 2.7%

Some HS, no diploma 1.6%

HS graduate 7.3%

Some college, no degree 6.7%

Associate's degree 2.1%

Bachelor's degree 27.3%

Graduate / professional 52.3%

Metric	%
HS diploma or higher	95.6%
Bachelor's or higher	79.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	310	6.5%
Kindergarten	215	4.5%
Elementary school	1,153	24.0%
High school	994	20.7%
College / grad school	2,126	44.3%

Employment

Industry of employment

Education & healthcare 29.2%

Professional & management 28.0%

Manufacturing 10.9%

Retail trade 8.3%

Finance & real estate 4.0%

Transportation & utilities 3.8%

Other services 3.8%

Information 3.1%

Arts, food & hospitality 3.1%

Public administration 3.1%

Construction 2.1%

Agriculture & mining 0.3%

Wholesale trade 0.3%

Occupation

Category	%
Management, business & arts	75.0%
Service	6.6%
Sales & office	9.8%
Natural resources & construction	2.7%
Production & transportation	5.9%

Employment type

Type	%
Private sector	86.5%
Government	8.5%
Self-employed	5.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	29.8%
Carpool	4.4%
Public transit	27.7%
Walk	5.8%
Work from home	26.0%
Other means	6.2%
Avg commute (minutes)	30.7

Poverty

All people 10.5%

Under 18 years 17.3%

18 and over 9.3%

Married-couple families 4.7%

Female-led households 21.9%

Income support

Source	% of households
Social Security	18.9%
Retirement income	13.1%
Supplemental Security	3.0%
Cash public assistance	1.7%
Food stamps / SNAP	9.2%

Health indicators

Condition	%
Obesity	21.2%
High blood pressure	23.7%
High cholesterol	24.4%
Diabetes	6.6%
Heart disease	3.6%
Stroke	1.9%
Asthma	9.9%
Arthritis	16.9%
Kidney disease	2.1%
Pulmonary disease	3.2%
Cancer	5.3%

Behavior / access	%
Smoking	8.5%
Binge drinking	16.5%
No physical activity	14.5%
Less than 7 hrs sleep	28.9%
Depression	16.8%
Fair or poor health	7.6%
Poor mental health	12.2%
Poor physical health	6.0%
No health insurance	5.1%
Visited doctor (checkup)	75.5%
Visited dentist	75.4%
Cholesterol screening	91.1%
Teeth loss	7.3%

Veterans & disability

Veterans	Count	%
Civilian veterans	389	2.1%

Disability	%
Any disability	7.5%
Under 18	0.7%
18–64 years	5.0%
65 and over	29.1%

Health insurance coverage

Type	%
Private insurance	83.8%
Public insurance	23.2%
No insurance	2.4%
Uninsured under 19	3.9%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	20,656	95.8%
Spanish	2,338	11.3%
Other Indo-European	209	1.0%
Asian & Pacific Islander	1,114	5.4%
Other languages	600	2.9%

Place of birth & citizenship

Origin	Count	%
Native born (US)	15,054	69.8%
Born in same state	14,490	67.2%
Born in different state	6,191	28.7%
Foreign born	564	2.6%
Naturalized citizen	6,499	30.2%
Not a US citizen	3,001	46.2%

Ancestry

Ancestry	Count	%
Italian	2,777	12.9%
French	2,294	10.6%
Arab	473	2.2%
English	198	0.9%
German	189	0.9%

Ancestry	Count	%
Polish	142	0.7%
Dutch	128	0.6%
Norwegian	103	0.5%
Irish	91	0.4%

Technology access

Metric	% of households
Computer access	46.2%
Internet access	97.1%

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

Frequently asked questions about ZIP code 02140

What city is ZIP code 02140 in?

ZIP code 02140 is primarily assigned to Cambridge, Massachusetts.

What county is ZIP code 02140 in?

ZIP code 02140 falls within Middlesex County, Massachusetts.

How educated is the population of ZIP code 02140?

80% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Is ZIP code 02140 mostly rentals?

64% of occupied units in ZIP code 02140 are renter-occupied.

What is the median household income in ZIP code 02140?

The median household income in ZIP code 02140 is $137,792, above the national median of ~$75,000.

What is the typical home value in ZIP code 02140?

The median home value in ZIP code 02140 is $994,800.

What timezone is ZIP code 02140 in?

ZIP code 02140 observes the EST timezone.