What city is 02127 in?

02127 is a South Boston, MA mailing address. By land area, 100% lies inside Boston.

What is the population of 02127?

About 36,769 people (±1,669), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 37,939.

What is the median household income in 02127?

$164,387 (±$15,055), 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 02127?

21 USPS carrier routes with 18,777 residential and 841 business mailboxes (19,633 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 02127?

The closest, measured center to center: 02210 (0.9 mi, Boston), 02205 (1.3 mi, Boston), 02111 (1.6 mi, Boston), 02118 (1.6 mi, Boston), 02125 (1.6 mi, Boston) and 02110 (1.7 mi, Boston).

02127 ZIP Code, South Boston, MA

02127 is a ZIP code in South Boston, Massachusetts in Suffolk County. It covers 2.1 square miles of land. The closest ZIP codes are 02210, 02205 and 02111. 36,769 people live here in 18,066 households, more than in 9 of every 10 Massachusetts ZIP codes. It is densely built, at about 17,866 people per square mile, and owners and renters are mixed (45% own). Median household income is $164,387, well above the Massachusetts median of $103,960; 21% of residents moved in during the past year.

Quick facts

Mailing city: South Boston, MA
County: Suffolk County
Land area: 2.1 sq mi
Population: 36,769
Median household income: $164,387
Carrier routes: 21 (18,777 homes)

Key figures

Measure	Value
Residents	36,769
Households	18,066
Median household income	$164,387
Income per person	$99,163
Median age	32.3
Homeowners	45.3%
Median home value	$863,700
Median rent	$2,736
Bachelor's degree or higher	69.8%
Average commute (minutes)	30
Households with kids under 18	12.1%
Moved in the past year	20.7%
Below the poverty line	11.1%
Broadband internet	91.6%
Speak a non-English language at home	17.7%

Household income

% of households	Value
<$10K	5.4%
$10–15K	2.9%
$15–25K	4.8%
$25–35K	2.1%
$35–50K	3.2%
$50–75K	7.2%
$75–100K	6.8%
$100–150K	13.6%
$150–200K	12.4%
$200K+	41.8%

Age

% of all residents	Value
<10	6.2%
10–19	4.4%
20–24	8.0%
25–34	37.4%
35–44	17.4%
45–54	8.6%
55–64	8.4%
65–74	5.0%
75+	4.7%

Tenure

% of housing units	Value
Owned, with mortgage	30.6%
Owned outright	11.5%
Rented	50.4%
Vacant	7.5%

Type of building

% of housing units	Value
Detached house	7.1%
Townhome	10.0%
2–4 units	48.7%
5–19 units	19.5%
20+ units	14.7%
Mobile / other	0.0%

Businesses in 02127

707 business establishments with 10,661 employees (ZIP Codes Business Patterns 2023).

Professional, Scientific, and Technical Services: 100
Accommodation and Food Services: 88
Other Services (except Public Administration): 85
Retail Trade: 76
Construction: 64
Health Care and Social Assistance: 57
Real Estate and Rental and Leasing: 54
Wholesale Trade: 34

EDDM carrier routes

02127 has 21 USPS carrier routes with 18,777 residential and 841 business mailboxes. Open the EDDM route map.

Carrier routes in 02127

02127 has 21 USPS carrier routes (21 city (C)) with 18,777 residential and 841 business mailboxes. Routes range from 660 homes (C026) to 1,533 homes (C023); the median route has 813 homes. The Census counted 18,066 households in 02127 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	0
500–749	6
750–999	10
1,000–1,499	4
1,500+	1

Best routes in 02127 for…

Most businesses

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

Route C024 — USPS business mailboxes 178, 889 homes
Route C004 — USPS business mailboxes 128, 781 homes
Route C023 — USPS business mailboxes 108, 1,533 homes
Route C021 — USPS business mailboxes 84, 966 homes
Route C019 — USPS business mailboxes 82, 1,247 homes

Select these 5 routes on the route map

Every carrier route in 02127

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C002	City	945	5	$200,001+	—	—	—
C004	City	781	128	$200,001+	—	—	—
C005	City	703	2	$150,000	—	—	—
C010	City	1,151	8	$15,388	—	—	—
C012	City	1,070	11	$134,001	—	—	—
C013	City	813	28	$16,335	—	—	—
C014	City	709	8	$144,722	—	—	—
C015	City	1,035	62	$106,015	—	—	—
C016	City	935	55	$106,015	—	—	—
C017	City	776	14	$144,722	—	—	—
C018	City	804	9	$122,895	—	—	—
C019	City	1,247	82	$106,015	—	—	—
C020	City	694	17	$147,782	—	—	—
C021	City	966	84	$134,001	—	—	—
C023	City	1,533	108	$26,486	—	—	—
C024	City	889	178	—	—	—	—
C025	City	717	9	$161,526	—	—	—
C026	City	660	8	$115,657	—	—	—
C027	City	735	3	$200,001+	—	—	—
C028	City	853	15	$200,001+	—	—	—
C029	City	761	7	$16,335	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 02127 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

02210 — Boston city, MA (0.9 mi)
02205 — Boston city, MA (1.3 mi)
02111 — Boston city, MA (1.6 mi)
02118 — Boston city, MA (1.6 mi)
02125 — Boston city, MA (1.6 mi)
02110 — Boston city, MA (1.7 mi)
02108 — Boston city, MA (2 mi)
02133 — Boston city, MA (2.1 mi)

Areas that include 02127

Where it ranks

Mail every home in 02127

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) 02127, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 02127 in?: 02127 is a South Boston, MA mailing address. By land area, 100% lies inside Boston.
What county is 02127 in?: 02127 is in Suffolk County.
What is the population of 02127?: About 36,769 people (±1,669), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 37,939.
What is the median household income in 02127?: $164,387 (±$15,055), 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 02127?: 21 USPS carrier routes with 18,777 residential and 841 business mailboxes (19,633 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 02127?: The closest, measured center to center: 02210 (0.9 mi, Boston), 02205 (1.3 mi, Boston), 02111 (1.6 mi, Boston), 02118 (1.6 mi, Boston), 02125 (1.6 mi, Boston) and 02110 (1.7 mi, Boston).

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