ZIP Code 01843 — Lawrence, MA
01843 is a standard (street delivery) ZIP code serving Lawrence, 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 01843 at a glance
| ZIP code | 01843 |
|---|---|
| Primary city | Lawrence |
| State | Massachusetts (MA) |
| County | Essex FIPS 25009 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 27,445 |
| Coordinates | 42.689850, -71.160950 |
How ZIP+4 works in 01843
The four digits after the hyphen encode a delivery segment inside 01843. 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 01843 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 Lawrence
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 01843.
| ZIP | City | Distance |
|---|---|---|
| 01840 | Lawrence, MA | 1.2 mi |
| 01841 | Lawrence, MA | 1.5 mi |
| 01810 | Andover, MA | 3 mi |
| 01844 | Methuen, MA | 3.4 mi |
| 01845 | North Andover, MA | 4 mi |
| 01835 | Haverhill, MA | 5.8 mi |
| 01876 | Tewksbury, MA | 6.3 mi |
| 01832 | Haverhill, MA | 7.1 mi |
| 01826 | Dracut, MA | 7.1 mi |
| 01921 | Boxford, MA | 7.2 mi |
| 03079 | Salem, NH | 7.6 mi |
| 01850 | Lowell, MA | 7.6 mi |
Questions about 01843
What is the ZIP+4 code for 01843?
01843 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 01843, you need to look up a specific street address to get them.
What city is 01843?
01843 is assigned to Lawrence, 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.