Zip Code 02121
Dorchester, Massachusetts — Suffolk County
📍 ZIP code 02121 is in Dorchester, Suffolk County, Massachusetts.
ZIP code 02121 is located in Dorchester, Suffolk County, Massachusetts. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 28,298. The area code for ZIP code 02121 is 617.
Quick Answer
Zip code 02121 is in Dorchester, Massachusetts (Suffolk County). It has a population of 28,298, median household income of $38,565, and median home value of $548,100.
Population
28,298
Income
$38,565
Home Value
$548,100
Climate
85°F / 19°F
About Zip Code 02121
Zip code 02121 is located in Dorchester, Massachusetts, within Suffolk County. Home to approximately 28,298 residents, this area sits at an elevation of 140 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 617.
The median household income is $38,565 per year, which is below the national median of $70,784. Homes in this zip code have a median value of $548,100, and the cost of living index is 134 (34% above the national average of 100).
Summers average a high of 85°F while winters drop to 19°F. The area receives about 49 in of rain and 32 in of snow annually. The zip code covers 1.7 square miles of land area.
Key Statistics
28,298
$38,565
$548,100
Eastern (EST/EDT)
617
140 ft
1.7 sq mi
34.2
11,384
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Compare With Nearby Zip Codes
| Metric | 02121 | 02119 | 02130 | 02124 | 02125 | 02120 |
|---|---|---|---|---|---|---|
| City | Dorchester, MA | Roxbury, MA | Jamaica Plain, MA | Dorchester Center, MA | Roxbury, MA | Roxbury Crossing, MA |
| Population | 28,298 | 26,851 | 41,109 | 55,897 | 33,069 | 15,248 |
| Median Income | $38,565 | $43,255 | $130,533 | $79,168 | $71,810 | $61,472 |
| Home Value | $548,100 | $668,900 | $763,700 | $607,200 | $645,400 | $941,200 |
| Cost of Living | 134 | 149 | 218 | 161 | 170 | 225 |
| Median Age | 34.2 | 35.3 | 34.9 | 36.9 | 34.4 | 24.5 |
Cost of Living
100 = National Average. Dorchester's cost of living is 34% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
14.2x
Demographics
Zip code 02121 has a population of 28,298 people with a median age of 34.2. There are 11,384 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Dorchester (02121) population trend from 2010 to 2024
↓ -15.3%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
85°F
19°F
49 in
32 in
Dorchester experiences warm summers with average highs around 85°F. Winters are cold with lows averaging 19°F. With 32 in of annual snowfall, residents should be prepared for significant winter weather.
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Housing & Economy
Median Home Value
$548,100
Median Household Income
$38,565
With 11,384 housing units across 1.7 square miles, 02121 has a housing density of 6,696 units per square mile. The home price-to-income ratio is 14.2x.
Location & Geography
Latitude
42.3063°
Longitude
-71.0859°
Land Area
1.7 sq mi
Water Area
0 sq mi
Nearby Zip Codes
Zip codes closest to 02121 (Dorchester, MA) with distances:
All Zip Codes in Dorchester, MA
Other zip codes serving Dorchester:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 02121's $38,565. A way to compare Dorchester to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 02121 (Dorchester, MA). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Dorchester, Massachusetts?
Dorchester, Massachusetts uses zip code 02121 along with 1 other zip codes.
What county is zip code 02121 in?
Zip code 02121 is located in Suffolk County, Massachusetts.
What is the population of zip code 02121?
The population of zip code 02121 is 28,298 with a median age of 34.2.
Is 02121 in Dorchester, Massachusetts?
Yes, zip code 02121 is in Dorchester, Suffolk County, Massachusetts. The area code is 617.
Frequently Asked Questions
What city is zip code 02121 in?
Zip code 02121 is in Dorchester, Massachusetts. It is part of Suffolk County and uses the Eastern (EST/EDT) timezone.
What is zip code 02121?
Zip code 02121 is a U.S. postal code in Dorchester, Massachusetts (Suffolk County). It has a population of 28,298 and covers 1.7 square miles.
What is the population of zip code 02121?
The population of zip code 02121 (Dorchester, MA) is 28,298 with a median age of 34.2. There are approximately 11,384 housing units in this area.
What is the median income in zip code 02121?
The median household income in zip code 02121 (Dorchester, MA) is $38,565 per year. The cost of living index is 134 (100 = national average).
What is the average home price in zip code 02121?
The median home value in zip code 02121 (Dorchester, MA) is $548,100. The cost of living index is 134 compared to the national average of 100.
What county is zip code 02121 in?
Zip code 02121 is located in Suffolk County, Massachusetts. The primary city is Dorchester.
What is the area code for zip code 02121?
Zip code 02121 in Dorchester, MA uses area code 617. It is located in the Eastern (EST/EDT) timezone.
Is zip code 02121 a good place to live?
Zip code 02121 (Dorchester, MA) has a cost of living index of 134 (100 = national average), a median household income of $38,565, and median home values of $548,100. The median age is 34.2. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 02121?
The cost of living index for zip code 02121 (Dorchester, MA) is 134, where 100 represents the national average. This area is above the national average. Median home value: $548,100.
What schools serve zip code 02121?
Zip code 02121 in Dorchester, Massachusetts is served by the local school district of Suffolk County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.