ZIP Code 02139
standardSource:
Cambridge · Middlesex County · Massachusetts
- Population
- 36,349
- Median income
- $134,586
- Median home value
- $1,087,500
- Bachelor's or higher
- 79.5%
- Land area
- 4.0 sq mi
9,009/sq mi
▲ 76% vs US
higher than 94% of US ZIPs
▲ 291% vs US
higher than 98% of US ZIPs
Median age 30
New York
ZIP code 02139 in Cambridge, Massachusetts has a population of 36,349. The median household income is $134,586, which is 76% above the national average. Median home value is $1,087,500, 291% above the US average. 79.5% of residents hold a bachelor's degree or higher.
ZIP code 02139 is classified by USPS as a standard delivery area and covers roughly 4.0 square miles in Cambridge, Middlesex County, Massachusetts. The area is home to 36,349 residents, producing a population density of 9,009 people per square mile, and falls within the New York time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 02139 against Massachusetts and the nation.
On the economic side, the median household income for ZIP 02139 sits at $134,586 (16% above the Massachusetts average), while per-capita income is $74,801. The poverty rate stands at 13.0% and the unemployment rate at 4.0%. On housing, the median home value is $1,087,500 (81% above the state average) with median rent at $2,691 per month, and 32.2% of occupied units are owner-occupied, a direct signal of whether 02139 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 79.5% of adults hold a bachelor's degree or higher, the median age is 30, and the average commute is 24 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Middlesex County, so you can benchmark 02139 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →
Top industries in ZIP 02139
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 02139.
- Professional, scientific, and technical services
Professional, scientific, and technical services
352 establishments
- Accommodation and food services
Accommodation and food services
158 establishments
- Health care and social assistance 115
Health care and social assistance
115 establishments
- Other services (except public administration) 95
Other services (except public administration)
95 establishments
- Retail trade 74
Retail trade
74 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, FHFA HPI for ZIP 02139, Cambridge, MA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; HUD FMR + FHFA HPI updated quarterly/annually.
Quick Facts
36,349
Population
4.0
Area (sq mi)
9,009
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 02139?
30.0
Median Age
51.8%
Male
48.2%
Female
28.9%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$134,586
Median Household Income
+16% vs state
$74,801
Per Capita Income
13.0%
Poverty Rate
4.0%
Unemployment Rate
24.4 min
Mean Commute Time
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
17,034
Total Housing Units
16,012
Occupied Units
1,022
Vacant Units
2.11
Avg Household Size
Occupancy Type
$1,087,500
Median Home Value
+81% vs state
$2,691
Median Rent
1938
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+3.9%
YoY Change (2021)
286
HPI Index (2000 = 100)
+186%
Total Change Since 2000
Home values in ZIP 02139 have increased 3.9% over the past year (2021). Since 2000, this ZIP has seen +186% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2017 | +19.6% | 279 |
| 2018 | -3.9% | 268 |
| 2019 | +8.3% | 290 |
| 2020 | -5.0% | 276 |
| 2021 | +3.9% | 286 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2021. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 1,118 business establishments in ZIP 02139, employing approximately 57,246 people with a combined annual payroll of $7,655,080,000.
1,118
Businesses
57,246
Employees
$7.7B
Annual Payroll
17
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Professional, scientific, and technical services | 352 | 31.5% |
| Accommodation and food services | 158 | 14.1% |
| Health care and social assistance | 115 | 10.3% |
| Other services (except public administration) | 95 | 8.5% |
| Retail trade | 74 | 6.6% |
| Real estate and rental and leasing | 56 | 5.0% |
| Finance and insurance | 41 | 3.7% |
| Information | 38 | 3.4% |
| Manufacturing | 35 | 3.1% |
| Arts, entertainment, and recreation | 34 | 3.0% |
| Educational services | 32 | 2.9% |
| Administrative and support and waste management and remediation services | 30 | 2.7% |
| Construction | 23 | 2.1% |
| Wholesale trade | 19 | 1.7% |
| Transportation and warehousing | 7 | 0.6% |
| Management of companies and enterprises | 3 | 0.3% |
| Industries not classified | 3 | 0.3% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 02139 vs 02215 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 02215 | Boston, MA | 26,125 | 1.0 mi |
| 02163 | Boston, MA | 2,582 | 0.9 mi |
| 02142 | Cambridge, MA | 3,141 | 1.1 mi |
| 02143 | Somerville, MA | 24,514 | 1.3 mi |
| 02141 | Cambridge, MA | 11,910 | 1.2 mi |
| 02115 | Boston, MA | 28,441 | 1.5 mi |
| 02134 | Allston, MA | 21,503 | 1.4 mi |
| 02199 | Boston, MA | 1,146 | 1.5 mi |
| 02114 | Boston, MA | 11,999 | 1.8 mi |
| 02120 | Roxbury Crossing, MA | 15,181 | 2.1 mi |
More ZIP Codes in Middlesex County
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Frequently Asked Questions
What county is ZIP code 02139 in? ▼
What is the population of ZIP code 02139? ▼
What is the median household income in ZIP 02139? ▼
What is the average home value in ZIP 02139? ▼
What is the demographic makeup of ZIP 02139? ▼
How many businesses are in ZIP code 02139? ▼
What are the main industries in ZIP code 02139? ▼
How have home values changed in ZIP code 02139? ▼
What is the education level in ZIP code 02139? ▼
What is the average commute time in ZIP 02139? ▼
What percentage of residents own vs. rent in ZIP 02139? ▼
What is the poverty rate in ZIP code 02139? ▼
ZIP Code Research Guides
Official Data Resources for Cambridge, MA
Verify and explore additional data for this area using these official government sources.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023). Business data: Source: Census ZIP Code Business Patterns (ZBP) 2023. Home value trends: Source: FHFA House Price Index (HPI), Five-Digit ZIP Codes.
PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.
Read our methodology , how this data is sourced, computed, and verified.