ZIP Code 01904 — Lynn, MA
01904 is a standard (street delivery) ZIP code serving Lynn, Massachusetts, in Essex County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 01904 at a glance
| ZIP code | 01904 |
|---|---|
| Primary city | Lynn |
| State | Massachusetts (MA) |
| County | Essex FIPS 25009 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 21,003 |
| Coordinates | 42.491510, -70.971660 |
How ZIP+4 works in 01904
The four digits after the hyphen encode a delivery segment inside 01904. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 01904 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Other ZIP codes in Lynn
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 01904.
| ZIP | City | Distance |
|---|---|---|
| 01905 | Lynn, MA | 1.9 mi |
| 01902 | Lynn, MA | 2.1 mi |
| 01901 | Lynn, MA | 2.5 mi |
| 01906 | Saugus, MA | 2.6 mi |
| 01960 | Peabody, MA | 2.9 mi |
| 01907 | Swampscott, MA | 3.5 mi |
| 01970 | Salem, MA | 3.8 mi |
| 01940 | Lynnfield, MA | 4.5 mi |
| 01880 | Wakefield, MA | 4.8 mi |
| 01908 | Nahant, MA | 4.9 mi |
| 02176 | Melrose, MA | 5.1 mi |
| 02151 | Revere, MA | 5.3 mi |
Questions about 01904
What is the ZIP+4 code for 01904?
01904 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 01904, you need to look up a specific street address to get them.
What city is 01904?
01904 is assigned to Lynn, Massachusetts, in Essex County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.