What city is 02129 in?

02129 is a Charlestown, MA mailing address. By land area, 100% lies inside Boston.

What is the population of 02129?

About 20,032 people (±1,079), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 19,120.

What is the median household income in 02129?

$157,247 (±$15,277), compared with $103,960 for Massachusetts as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 02129?

17 USPS carrier routes with 8,934 residential and 580 business mailboxes (9,518 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 02129?

The closest, measured center to center: 02109 (1 mi, Boston), 02113 (1 mi, Boston), 02114 (1.1 mi, Boston), 02141 (1.3 mi, Cambridge), 02203 (1.3 mi, Boston) and 02133 (1.5 mi, Boston).

02129 ZIP Code, Charlestown, MA

02129 is a ZIP code in Charlestown, Massachusetts in Suffolk County. It covers 1.4 square miles of land. The closest ZIP codes are 02109, 02113 and 02114. 20,032 people live here in 9,606 households. It is densely built, at about 14,806 people per square mile, and owners and renters are mixed (51% own). Median household income is $157,247, well above the Massachusetts median of $103,960.

Quick facts

Mailing city: Charlestown, MA
County: Suffolk County
Land area: 1.4 sq mi
Population: 20,032
Median household income: $157,247
Carrier routes: 17 (8,934 homes)

Key figures

Measure	Value
Residents	20,032
Households	9,606
Median household income	$157,247
Income per person	$100,420
Median age	35.6
Homeowners	50.5%
Median home value	$912,000
Median rent	$2,259
Bachelor's degree or higher	71.2%
Average commute (minutes)	28.7
Households with kids under 18	23.1%
Moved in the past year	14.3%
Below the poverty line	8.8%
Broadband internet	95.3%
Speak a non-English language at home	18.0%

Household income

% of households	Value
<$10K	2.5%
$10–15K	3.7%
$15–25K	5.7%
$25–35K	4.7%
$35–50K	3.9%
$50–75K	6.6%
$75–100K	6.4%
$100–150K	14.7%
$150–200K	11.1%
$200K+	40.7%

Age

% of all residents	Value
<10	12.6%
10–19	7.9%
20–24	2.8%
25–34	25.8%
35–44	18.3%
45–54	10.2%
55–64	8.3%
65–74	10.1%
75+	4.0%

Tenure

% of housing units	Value
Owned, with mortgage	31.6%
Owned outright	16.5%
Rented	47.0%
Vacant	5.0%

Type of building

% of housing units	Value
Detached house	5.9%
Townhome	15.9%
2–4 units	32.7%
5–19 units	15.2%
20+ units	30.2%
Mobile / other	0.0%

Businesses in 02129

536 business establishments with 13,245 employees (ZIP Codes Business Patterns 2023).

Professional, Scientific, and Technical Services: 113
Other Services (except Public Administration): 61
Real Estate and Rental and Leasing: 49
Health Care and Social Assistance: 44
Retail Trade: 41
Accommodation and Food Services: 40
Manufacturing: 30
Construction: 28

EDDM carrier routes

02129 has 17 USPS carrier routes with 8,934 residential and 580 business mailboxes. Open the EDDM route map.

Carrier routes in 02129

02129 has 17 USPS carrier routes (17 city (C)) with 8,934 residential and 580 business mailboxes. Routes range from 251 homes (C016) to 875 homes (C020); the median route has 507 homes. The Census counted 9,606 households in 02129 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	8
500–749	6
750–999	3
1,000–1,499	0
1,500+	0

Best routes in 02129 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

Route C016 — USPS business mailboxes 121, 251 homes
Route C008 — USPS business mailboxes 92, 474 homes
Route C017 — USPS business mailboxes 91, 569 homes
Route C009 — USPS business mailboxes 51, 356 homes
Route C012 — USPS business mailboxes 44, 525 homes

Select these 5 routes on the route map

Every carrier route in 02129

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	387	3	$200,001+	—	—	—
C002	City	599	15	$160,558	—	—	—
C003	City	377	23	$170,471	—	—	—
C004	City	521	16	$137,570	—	—	—
C005	City	362	9	$181,620	—	—	—
C006	City	326	40	$187,132	—	—	—
C007	City	507	2	$200,001+	—	—	—
C008	City	474	92	$112,290	—	—	—
C009	City	356	51	$160,558	—	—	—
C010	City	640	8	$15,697	—	—	—
C012	City	525	44	$200,001+	—	—	—
C016	City	251	121	$137,570	—	—	—
C017	City	569	91	$33,211	—	—	—
C018	City	827	33	$200,001+	—	—	—
C019	City	862	12	$200,001+	—	—	—
C020	City	875	10	$152,536	—	—	—
C021	City	476	10	$152,536	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 02129 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

02109 — Boston city, MA (1 mi)
02113 — Boston city, MA (1 mi)
02114 — Boston city, MA (1.1 mi)
02141 — Cambridge city, MA (1.3 mi)
02203 — Boston city, MA (1.3 mi)
02133 — Boston city, MA (1.5 mi)
02142 — Cambridge city, MA (1.5 mi)
02110 — Boston city, MA (1.6 mi)

Areas that include 02129

Where it ranks

Mail every home in 02129

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 02129, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 02129 in?: 02129 is a Charlestown, MA mailing address. By land area, 100% lies inside Boston.
What county is 02129 in?: 02129 is in Suffolk County.
What is the population of 02129?: About 20,032 people (±1,079), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 19,120.
What is the median household income in 02129?: $157,247 (±$15,277), compared with $103,960 for Massachusetts as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 02129?: 17 USPS carrier routes with 8,934 residential and 580 business mailboxes (9,518 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 02129?: The closest, measured center to center: 02109 (1 mi, Boston), 02113 (1 mi, Boston), 02114 (1.1 mi, Boston), 02141 (1.3 mi, Cambridge), 02203 (1.3 mi, Boston) and 02133 (1.5 mi, Boston).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.