02129 ZIP Code — Charlestown, MA

Suffolk County, Massachusetts

ZIP code 02129 is located in Charlestown, Massachusetts, within Suffolk County. It covers approximately 1.35 square miles and serves a population of 19,832 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 617/857/781/339.

About ZIP code 02129

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 $913,500. Owner-occupancy sits near the national average at 48%.

The gap between median ($146,815) 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 professional and management as the leading industry. The average commute of 29 minutes is near the national average.

Educational attainment is high — 71% of residents hold a bachelor's degree or higher, well above the national average of 33%.

19,832

population

1.35

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

02129 ZIP code map

Cities in ZIP code 02129

Below are the cities the US Postal Service accepts for ZIP code 02129. Using any city not on this list may result in mail delivery delays.

City	Status
Charlestown	Acceptable
Charlestown	Preferred

Nearby ZIP codes

02222 Boston (1.1 mi) 02141 Cambridge (1.2 mi) 02113 Boston (1.2 mi) 02114 Boston (1.4 mi) 02109 Boston (1.4 mi) 02203 Boston (1.4 mi) 02142 Cambridge (1.6 mi) 02206 Boston (1.6 mi) 02204 Boston (1.6 mi) 02217 Boston (1.6 mi) 02201 Boston (1.6 mi) 02211 Boston (1.6 mi)

Demographics updated 05/2026

Population
Total population	19,832
Population density	14,690 / sq mi
State FIPS	25
County FIPS	025

Geography
Land area	1.35 sq mi
Water area	0.49 sq mi
Latitude	42.3817
Longitude	-71.0641
Timezone	Eastern (ET)
Area code	617/857/781/339

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	25.7%	37.5%	31.3%
$50k – $100k	14.7%	23.6%	25.9%
$100k – $200k	30.9%	25.7%	28.5%
Over $200k	28.7%	13.2%	14.3%

Demographics & statistics

19,832

Population

14,690

People per sq mi

35.8

Median age

$146,815

Median household income

$88,676

Per capita income

$913,500

Median home value

$1,900

Median monthly rent

48.2%

Home ownership

8.4%

Poverty rate

2.5%

Unemployment

5,060

Housing units

70.6%

Bachelor's or higher

Age distribution

Male Female

783

Under 5

905

570

5–9

658

528

10–14

610

158

15–19

182

191

20–24

221

2,200

25–34

2,540

1,689

35–44

1,951

1,002

45–54

1,157

488

55–59

563

416

60–64

480

767

65–74

886

298

75–84

345

113

85+

131

← Male

Female →

Age summary

Group	Count	%
Under 18	4,284	21.6%
18 and over	15,548	78.4%
65 and over	2,540	12.8%
Median age	35.8 years

Race & ethnicity

White 71.5%

Asian 7.6%

Two or more races 6.9%

Black or African American 6.6%

Hispanic or Latino 5.4%

Other race 1.9%

Group	Count	%
White	14,998	71.5%
Asian	1,602	7.6%
Two or more races	1,439	6.9%
Black or African American	1,394	6.6%
Hispanic or Latino	1,139	5.4%
Other race	397	1.9%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	25.7%	37.5%	31.3%
$50k – $100k	14.7%	23.6%	25.9%
$100k – $200k	30.9%	25.7%	28.5%
Over $200k	28.7%	13.2%	14.3%

Under $10k 2.9%

$10k–$15k 4.0%

$15k–$25k 6.4%

$25k–$35k 5.7%

$35k–$50k 3.7%

$50k–$75k 7.5%

$75k–$100k 8.1%

$100k–$150k 12.6%

$150k–$200k 11.9%

$200k+ 37.3%

Range	% of households
Under $10k	2.9%
$10k–$15k	4.0%
$15k–$25k	6.4%
$25k–$35k	5.7%
$35k–$50k	3.7%
$50k–$75k	7.5%
$75k–$100k	8.1%
$100k–$150k	12.6%
$150k–$200k	11.9%
$200k+	37.3%
Median income	$146,815

Housing

Home values

Under $50k 0.2%

$50k–$100k 0.4%

$150k–$200k 0.2%

$200k–$300k 0.6%

$300k–$500k 7.3%

$500k–$1M 51.4%

$1M+ 39.9%

Housing overview

Metric	Value
Median home value	$913,500
Median rent / month	$1,900
Owner occupied	48.2%
Renter occupied	51.8%
Vacant	6.4%
Single-family detached	5.3%
Large apartment buildings	30.5%
Mobile homes	0.0%
Median rooms	4.0
Avg household size (owned)	2.25

Year built

Era	%
2020 or later	0.5%
2010–2019	5.3%
2000–2009	8.0%
1990–1999	4.4%
1980–1989	8.4%
1970–1979	8.2%
1960–1969	2.4%
1950–1959	3.5%
1940–1949	7.0%
1939 or earlier	52.4%

Bedrooms

Size	% of units
No bedroom (studio)	6.4%
1 bedroom	27.7%
2 bedrooms	39.2%
3 bedrooms	16.9%
4 bedrooms	8.0%
5+ bedrooms	1.8%

Vehicles per household

Vehicles	% of households
No vehicle	20.8%
1 vehicle	57.1%
2 vehicles	20.7%
3 or more	1.5%

Heating fuel

Fuel type	%
Utility gas	56.0%
Electricity	35.6%
Propane / LP gas	2.5%
Fuel oil	2.3%
No fuel used	2.8%

Households & families

Household type	Count	%
Married-couple family	3,479	37.9%
Cohabiting couple	797	8.7%
Male householder, no spouse	1,568	17.1%
Female householder, no spouse	3,343	36.4%
Households with children under 18	2,448	26.6%
Households with seniors (65+)	1,943	21.1%
Average household size	2.15

Marital status

Status	Male	Female
Never married	38.3%	38.8%
Married	55.5%	43.4%
Separated	0.7%	2.3%
Widowed	0.9%	6.3%
Divorced	4.7%	9.2%

Education

Less than 9th grade 2.4%

Some HS, no diploma 3.8%

HS graduate 13.3%

Some college, no degree 6.8%

Associate's degree 3.0%

Bachelor's degree 35.1%

Graduate / professional 35.5%

Metric	%
HS diploma or higher	93.8%
Bachelor's or higher	70.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	465	13.2%
Kindergarten	353	10.0%
Elementary school	1,703	48.4%
High school	325	9.2%
College / grad school	671	19.1%

Employment

Industry of employment

Professional & management 28.9%

Education & healthcare 25.6%

Finance & real estate 12.5%

Retail trade 7.6%

Manufacturing 4.6%

Arts, food & hospitality 4.6%

Public administration 4.1%

Construction 3.4%

Information 3.2%

Other services 2.8%

Transportation & utilities 1.7%

Wholesale trade 1.1%

Occupation

Category	%
Management, business & arts	67.6%
Service	11.2%
Sales & office	15.2%
Natural resources & construction	2.8%
Production & transportation	3.2%

Employment type

Type	%
Private sector	87.3%
Government	9.9%
Self-employed	2.9%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	32.0%
Carpool	4.6%
Public transit	20.6%
Walk	15.2%
Work from home	19.1%
Other means	8.5%
Avg commute (minutes)	29.3

Poverty

All people 8.4%

Under 18 years 10.5%

18 and over 7.8%

Married-couple families 2.5%

Female-led households 15.5%

Income support

Source	% of households
Social Security	17.8%
Retirement income	12.7%
Supplemental Security	3.7%
Cash public assistance	3.0%
Food stamps / SNAP	12.7%

Health indicators

Condition	%
Obesity	19.4%
High blood pressure	20.3%
High cholesterol	24.2%
Diabetes	6.0%
Heart disease	3.8%
Stroke	1.8%
Asthma	10.5%
Arthritis	16.8%
Kidney disease	2.0%
Pulmonary disease	3.8%
Cancer	5.2%

Behavior / access	%
Smoking	11.3%
Binge drinking	21.1%
No physical activity	15.5%
Less than 7 hrs sleep	29.5%
Depression	20.3%
Fair or poor health	8.5%
Poor mental health	13.7%
Poor physical health	6.6%
No health insurance	5.8%
Visited doctor (checkup)	74.4%
Visited dentist	73.0%
Cholesterol screening	89.5%
Teeth loss	8.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	510	3.3%

Disability	%
Any disability	9.1%
Under 18	5.4%
18–64 years	5.6%
65 and over	33.5%

Health insurance coverage

Type	%
Private insurance	81.0%
Public insurance	29.3%
No insurance	1.0%
Uninsured under 19	1.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	18,144	91.5%
Spanish	1,131	6.2%
Other Indo-European	298	1.6%
Asian & Pacific Islander	135	0.7%
Other languages	655	3.6%

Place of birth & citizenship

Origin	Count	%
Native born (US)	17,052	86.0%
Born in same state	16,581	83.6%
Born in different state	10,659	53.7%
Foreign born	471	2.4%
Naturalized citizen	2,780	14.0%
Not a US citizen	1,644	59.1%

Ancestry

Ancestry	Count	%
Italian	5,066	25.5%
French	2,379	12%
Arab	930	4.7%
German	646	3.3%
Polish	111	0.6%

Ancestry	Count	%
Norwegian	111	0.6%
English	75	0.4%
Dutch	57	0.3%
Irish	30	0.2%

Technology access

Metric	% of households
Computer access	46.3%
Internet access	95.7%

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

Frequently asked questions about ZIP code 02129

What city is ZIP code 02129 in?

ZIP code 02129 is primarily assigned to Charlestown, Massachusetts.

What county is ZIP code 02129 in?

ZIP code 02129 falls within Suffolk County, Massachusetts.

How educated is the population of ZIP code 02129?

71% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the median household income in ZIP code 02129?

The median household income in ZIP code 02129 is $146,815, above the national median of ~$75,000.

What is the typical home value in ZIP code 02129?

The median home value in ZIP code 02129 is $913,500.

What is the population of ZIP code 02129?

ZIP code 02129 has an estimated population of 19,832 residents, with a density of 14,658 people per square mile.

What timezone is ZIP code 02129 in?

ZIP code 02129 observes the EST timezone.