Cambridge, MA
02139
Middlesex County County · Massachusetts · Pop. 41,780
Last updated: May 2026
Cambridge, Massachusetts (ZIP code 02139) is home to approximately 41,780 residents. The median household income in 02139 is $122,519, which is 73% above the national average of $70,784. The cost of living in 02139 is reflected in its housing market - the median home value is $520,529 and the average rent is $1,929/month. 02139 has a violent crime rate of 105.0 per 100,000 residents, which is 72% below the national average - earning it a safety grade of A+. 02139 is served by with an average school rating of 8.5/10. Air quality in 02139 is rated Good with an average AQI of 26.9. The average commute time in 02139 is 25 minutes, 2 minutes below the national average. Compare 02139 vs national averages and nearby neighborhoods using our free ZipScore intelligence platform.
On This Page
👥 Demographics
Race & Ethnicity
💰 Income & Economy
Affordability Assessment: Renters in this area spend approximately 19% of their income on rent, which is considered very affordable. Home prices are moderately affordable at 4.2x the median income.
🏠 Housing
🔒 Safety & Crime
Cambridge (02139) is significantly safer than the national average, with violent crime rates 72% below the US average. This is considered a very safe area.
🎓 Schools & Education
Top Schools in 02139
| School | Type | Rating | Students |
|---|---|---|---|
| Cambridge Academy | public | 8/10 | 610 |
🌡️ Climate & Weather
🌫️ Air Quality
⚠️ Natural Disaster Risk
🚗 Commute
Nearby ZIP Codes
Compare 02139 With Another ZIP
Pros and Cons of Living in Cambridge, MA (02139)
Based on crime, housing, income, schools, and air quality data
✅ Pros
- + Low crime rate - violent crime is 72% below the national average
- + Above-average income - median household income of $122,519
- + Good air quality - average AQI of 26.9 (rated "Good" by EPA standards)
- + Strong schools - average school rating 8.5/10
- + Low natural disaster risk - minimal risk of flooding, earthquakes, and severe weather
⚠️ Cons
- − High housing costs - home prices 72% above the national average
- − High rent - average $1,929/month, above the national median of $1,163
Data sourced from US Census Bureau, FBI Crime Statistics, and EPA. Individual experiences may vary.
Frequently Asked Questions about ZIP Code 02139
What is the population of 02139? ▼
The population of ZIP code 02139 in Cambridge, Massachusetts is approximately 41,780 people.
Is 02139 safe to live in? ▼
Cambridge (02139) is significantly safer than the national average, with violent crime rates 72% below the US average. This is considered a very safe area. Safety Grade: A+.
What is the median income in 02139? ▼
The median household income in 02139 (Cambridge, Massachusetts) is $122,519. The per capita income is $79,637. The US national median household income is $70,784.
What is the cost of living in 02139? ▼
Renters in this area spend approximately 19% of their income on rent, which is considered very affordable. Home prices are moderately affordable at 4.2x the median income. Median home value: $520,529. Average rent: $1,929/month.
What are schools like in 02139? ▼
Schools in 02139 receive an Education Grade of A-. There are 1 schools with an average rating of 8.5/10 and a student-teacher ratio of 18:1. See the full schools section above for individual school listings.
What is the crime rate in 02139? ▼
The violent crime rate in 02139 is 105.0 per 100,000 residents, which is below the national average of 380.7. Property crime rate: 794.0 per 100k (national avg: 1,958.2).
What is the average rent in 02139? ▼
The median monthly rent in 02139 (Cambridge, Massachusetts) is $1,929/month. The national median rent is $1,163/month.
What is the median home value in 02139? ▼
The median home value in 02139 (Cambridge, Massachusetts) is $520,529. The national median home value is $303,400.
Is 02139 a good place to live? ▼
02139 (Cambridge, Massachusetts) has a ZipScore of 78/100 - our composite score based on safety (25%), affordability (20%), schools (15%), air quality (10%), climate (10%), commute (10%), and disaster risk (10%). This is an excellent neighborhood to live in.
What is the air quality in 02139? ▼
The average Air Quality Index (AQI) in 02139 is 26.9 - rated Good by EPA standards. Average PM2.5 level: 5.3 µg/m³.
Data sourced from U.S. Census Bureau (ACS), FBI Uniform Crime Report, EPA AirNow, FEMA National Risk Index, and Open-Meteo. Last updated: May 2026