ZIP Code 01951 — Newbury, MA
01951 is a standard (street delivery) ZIP code serving Newbury, 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 01951 at a glance
| ZIP code | 01951 |
|---|---|
| Primary city | Newbury |
| State | Massachusetts (MA) |
| County | Essex FIPS 25009 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,327 |
| Coordinates | 42.777420, -70.850220 |
How ZIP+4 works in 01951
The four digits after the hyphen encode a delivery segment inside 01951. 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 01951 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.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 01951.
| ZIP | City | Distance |
|---|---|---|
| 01950 | Newburyport, MA | 3.1 mi |
| 01922 | Byfield, MA | 3.6 mi |
| 01969 | Rowley, MA | 4.3 mi |
| 01952 | Salisbury, MA | 4.8 mi |
| 01985 | West Newbury, MA | 6.1 mi |
| 01938 | Ipswich, MA | 6.4 mi |
| 01913 | Amesbury, MA | 7.1 mi |
| 01833 | Georgetown, MA | 7.6 mi |
| 03874 | Seabrook, NH | 7.6 mi |
| 01834 | Groveland, MA | 8.5 mi |
| 01860 | Merrimac, MA | 9.2 mi |
| 01982 | South Hamilton, MA | 10.4 mi |
Questions about 01951
What is the ZIP+4 code for 01951?
01951 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 01951, you need to look up a specific street address to get them.
What city is 01951?
01951 is assigned to Newbury, 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.