ZIP code 02139
Where is ZIP code 02139?
Cambridge, Massachusetts
Middlesex County · Standard ZIP code
ZIP code 02139 belongs to Cambridge, Massachusetts in Middlesex County. 02139 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Eastern Time zone and uses area codes 617 and 857. About 40,033 people live in the 02139 area, where the median household income is $134,586. The closest ZIP codes are 02238 (Cambridge, 0.7 mi north), 02141 (Cambridge, 1.1 mi east) and 02142 (Cambridge, 1.1 mi east).
| ZIP code | 02139 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Cambridge |
| State | Massachusetts (MA) |
| County | Middlesex County |
| Time zone | Eastern Time · now |
| Area codes | 617, 857 |
| Coordinates | 42.3647, -71.1042 map |
| 3-digit prefix | 021 |
Population and income in 02139
| Population | 40,033 · higher than 95% of Massachusetts ZIP codes |
|---|---|
| People per square mile | 25,794 · higher than 98% of Massachusetts ZIP codes |
| Median age | 30 years · lower than 96% of Massachusetts ZIP codes |
| Men / women | 52% / 48% |
| Median household income | $134,586 · higher than 73% of Massachusetts ZIP codes |
| Income per person | $74,801 |
| Below the poverty line | 13% |
| Bachelor’s degree or higher | 80% of adults 25+ |
| Median home value | $1,087,500 · higher than 92% of Massachusetts ZIP codes |
| Median rent | $2,691 a month |
| Housing units | 17,034 |
| Households | 16,012 (2.11 people on average) |
| Owners / renters | 32% / 68% |
| Land area | 1.55 sq mi (plus 0.21 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 02139. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 02139
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 02238 | Cambridge, MA | 0.7 mi N | PO Box only |
| 02141 | Cambridge, MA | 1.1 mi E | Standard |
| 02142 | Cambridge, MA | 1.1 mi E | Standard |
| 02215 | Boston, MA | 1.2 mi S | Standard |
| 02143 | Somerville, MA | 1.3 mi N | Standard |
| 02138 | Cambridge, MA | 1.4 mi NW | Standard |
| 02199 | Boston, MA | 1.6 mi SE | Standard |
| 02115 | Boston, MA | 1.6 mi S | Standard |
| 02134 | Allston, MA | 1.7 mi SW | Standard |
| 02116 | Boston, MA | 1.8 mi SE | Standard |
| 02446 | Brookline, MA | 1.8 mi SW | Standard |
| 02114 | Boston, MA | 1.9 mi E | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 02139 or measure the distance to another ZIP code.
How to address mail to 02139
123 MAIN ST
CAMBRIDGE MA 02139
Put the city, the two-letter state code and the ZIP code on the last line. Avoid Cambridgeport and Inman Square: USPS doesn’t recognize them as the city for this ZIP code. Adding the 4-digit ZIP+4 code (02139-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Cambridge, MA
All Cambridge ZIP codes with population and income →
Questions
- What city is ZIP code 02139?
- 02139 is a Cambridge, Massachusetts ZIP code.
- What county is 02139 in?
- ZIP code 02139 is in Middlesex County, Massachusetts.
- What time zone is ZIP code 02139 in?
- 02139 is in the Eastern Time zone (America/New_York).
- What area code is 02139?
- Phone numbers in ZIP code 02139 use area codes 617 and 857.
- What is the population of ZIP code 02139?
- About 40,033 people live in ZIP code 02139, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 02139?
- The median household income in 02139 is $134,586 a year, higher than 73% of Massachusetts ZIP codes.
- What ZIP codes are near 02139?
- The nearest ZIP codes to 02139 are 02238 (Cambridge, 0.7 miles), 02141 (Cambridge, 1.1 miles), 02142 (Cambridge, 1.1 miles) and 02215 (Boston, 1.2 miles).