Home / Massachusetts ZIP Codes / ZIP Code 02138

ZIP code 02138 belongs to Cambridge, Massachusetts, in Middlesex. If you are mailing a letter or package to this area, use Cambridge, MA 02138 in the address. On this page you will find the city and county for 02138, nearby ZIP codes in the same county, and free tools to look up any address in this ZIP code.

What City Is ZIP Code 02138?

The city for ZIP code 02138 is Cambridge, Massachusetts. When you write an address in this area, the correct format is: Name, Street Address, Cambridge, MA 02138.

ZIP Code 02138 County and State

ZIP code 02138 is located in Middlesex, Massachusetts. For a complete list of cities and ZIP codes across the state, see the Massachusetts ZIP Codes page.

Nearby ZIP Codes in Middlesex

These ZIP codes are in the same county as 02138:

ZIP Code 02138 on the Map

The map below shows the approximate center of ZIP code 02138, near Cambridge, Massachusetts. You can zoom in and drag the map to explore the area.

Map center is approximate (ZIP area center, around 42.377, -71.1256). Map data © OpenStreetMap.

Population and Demographics of ZIP Code 02138

According to public U.S. Census Bureau data, ZIP code 02138 is home to a community in Massachusetts. The figures below come from the U.S. Census and the American Community Survey (ACS).

Source: U.S. Census Bureau, American Community Survey (ACS) 2023 5-year estimates and 2023 Gazetteer. Figures are estimates and change with each new survey.

Find an Address in ZIP Code 02138

Need the full ZIP+4 code for a specific street address in Cambridge? Use the free ZIP+4 Lookup tool, or find any ZIP code from a street address with the ZIP Code by Address tool.

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