ZIP code 02138
Where is ZIP code 02138?
Cambridge, Massachusetts
Middlesex County · Standard ZIP code
ZIP code 02138 belongs to Cambridge, Massachusetts in Middlesex County. 02138 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 38,509 people live in the 02138 area, where the median household income is $119,967. The closest ZIP codes are 02238 (Cambridge, 1 mi east), 02140 (Cambridge, 1.2 mi north) and 02143 (Somerville, 1.2 mi east).
| ZIP code | 02138 |
|---|---|
| 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 | 42.377, -71.1256 map |
| 3-digit prefix | 021 |
Population and income in 02138
| Population | 38,509 · higher than 94% of Massachusetts ZIP codes |
|---|---|
| People per square mile | 14,065 · higher than 93% of Massachusetts ZIP codes |
| Median age | 28.3 years · lower than 97% of Massachusetts ZIP codes |
| Men / women | 48% / 52% |
| Median household income | $119,967 · higher than 60% of Massachusetts ZIP codes |
| Income per person | $75,496 |
| Below the poverty line | 14% |
| Bachelor’s degree or higher | 86% of adults 25+ |
| Median home value | $1,212,400 · higher than 96% of Massachusetts ZIP codes |
| Median rent | $2,772 a month |
| Housing units | 16,043 |
| Households | 14,169 (2.04 people on average) |
| Owners / renters | 42% / 58% |
| Land area | 2.74 sq mi (plus 0.33 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 02138. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 02138
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 02238 | Cambridge, MA | 1 mi E | PO Box only |
| 02140 | Cambridge, MA | 1.2 mi N | Standard |
| 02143 | Somerville, MA | 1.2 mi E | Standard |
| 02139 | Cambridge, MA | 1.4 mi SE | Standard |
| 02144 | Somerville, MA | 1.6 mi N | Standard |
| 02134 | Allston, MA | 1.7 mi S | Standard |
| 02145 | Somerville, MA | 1.9 mi NE | Standard |
| 02141 | Cambridge, MA | 2.2 mi E | Standard |
| 02446 | Brookline, MA | 2.3 mi S | Standard |
| 02215 | Boston, MA | 2.4 mi SE | Standard |
| 02142 | Cambridge, MA | 2.4 mi SE | Standard |
| 02135 | Brighton, MA | 2.6 mi SW | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 02138 or measure the distance to another ZIP code.
How to address mail to 02138
123 MAIN ST
CAMBRIDGE MA 02138
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (02138-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 02138?
- 02138 is a Cambridge, Massachusetts ZIP code.
- What county is 02138 in?
- ZIP code 02138 is in Middlesex County, Massachusetts.
- What time zone is ZIP code 02138 in?
- 02138 is in the Eastern Time zone (America/New_York).
- What area code is 02138?
- Phone numbers in ZIP code 02138 use area codes 617 and 857.
- What is the population of ZIP code 02138?
- About 38,509 people live in ZIP code 02138, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 02138?
- The median household income in 02138 is $119,967 a year, higher than 60% of Massachusetts ZIP codes.
- What ZIP codes are near 02138?
- The nearest ZIP codes to 02138 are 02238 (Cambridge, 1 miles), 02140 (Cambridge, 1.2 miles), 02143 (Somerville, 1.2 miles) and 02139 (Cambridge, 1.4 miles).