Residential delivery area · Massachusetts
ZIP Code 02127: South Boston, MA
ZIP code 02127 uses the postal name South Boston, Massachusetts and lies entirely in Suffolk County (Census 2020 ZIP-county file). About 37,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $164,387 (Census Bureau, ACS 2020-2024). Most of its land (100%) lies in the city of Boston.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- South Boston · its only residential ZIP
- County
- Suffolk County
- Census places
- Boston
- Metro area
- Boston-Cambridge-Newton, MA-NH
- House district
- MA-8 119th Congress
- State
- Massachusetts
- Time zone
- Eastern
- Land area
- 2.1 sq mi · 17,866 people per sq mi
Where is ZIP code 02127?
02127 centers on 42.335°, -71.038° and covers 2.1 square miles of land plus 0.6 of water. It borders 5 ZIP codes: 02210, 02205, 02111, 02118, 02125.
The map draws ZIP code areas only. For the streets inside 02127, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 02127 compare with the rest of Suffolk County?
| Measure | 02127 | In Suffolk County | In MA |
|---|---|---|---|
| People (ACS 2020-2024) | 36,769 | 8th of 37 | 38th of 539 |
| Median household income | $164k | 3rd of 29 | 58th of 406 |
| Median home value | $864k | 12th of 30 | 70th of 449 |
Its median household income is higher than in 97% of U.S. residential ZIP codes, and it is denser than 99% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 02127?
The 2020 Census counted 37,939 people in 02127; the ACS, which samples households over 2020-2024, estimates 36,769. Between the 2010 and 2020 censuses its population grew 19.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 36,769
- 2020 Census count
- 37,939+19.3% since 2010 (31,799)
- Households
- 18,066
- Median age
- 32.3
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 02127?
Of the 36,769 people the ACS estimates in 02127, 9.9% are under 18 and 9.7% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (76.3%), then Hispanic or Latino (10.5%).
- Under 189.9%
- 18 to 6480.4%
- 65 and older9.7%
- White, not Hispanic76.3%
- Hispanic or Latino10.5%
- Asian, not Hispanic6.4%
- Black, not Hispanic3.6%
- Other or two or more3.2%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 02127 earn?
Median household income is $164,387 (ACS 2020-2024), the 3rd highest of the 29 ranked ZIP codes in Suffolk County. It rose from $133,925 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $164,387
- Income per person
- $99,163
- Below the poverty line
- 11.1%
- Unemployed (of the labor force)
- 4.0%
- Adults 25+ with a bachelor's degree
- 69.8%
- Adjusted gross income per tax return, 2022
- $137,83221,930 returns; wages 83% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 02127?
FHFA's house price index for 02127, built from repeat sales and appraisals of the same homes, rose 80% from 2015 to 2025 and rose 24% from 2020 to 2025, and moved +5.7% in 2025.
- Median home value (owners' estimate)
- $863,700
- Median gross rent
- $2,736
- Homes owned by their occupants
- 45.3%
- Housing units
- 19,534
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 02127?
707 business establishments had a location in this ZIP code in 2023, 35 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services100
- Accommodation and food services88
- Other services (except public administration)85
- Retail trade76
- Construction64
- Health care and social assistance57
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 02127?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 02210 | Boston | 6,971 | $172k | 0.9 mi |
| 02205 | Boston | 0 | – | 1.3 mi |
| 02111 | Boston | 8,407 | $87k | 1.6 mi |
| 02118 | Boston | 28,946 | $98k | 1.6 mi |
| 02125 | Dorchester | 33,662 | $83k | 1.6 mi |
| 02110 | Boston | 2,342 | $138k | 1.7 mi (near) |
| 02108 | Boston | 3,794 | $213k | 2.0 mi (near) |
| 02133 | Boston | 62 | – | 2.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.