ZIP Code 01077 — Southwick, MA
01077 is a standard (street delivery) ZIP code serving Southwick, Massachusetts, in Hampden 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 01077 at a glance
| ZIP code | 01077 |
|---|---|
| Primary city | Southwick |
| State | Massachusetts (MA) |
| County | Hampden FIPS 25013 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 9,217 |
| Coordinates | 42.054410, -72.778510 |
How ZIP+4 works in 01077
The four digits after the hyphen encode a delivery segment inside 01077. 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 01077 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 01077.
| ZIP | City | Distance |
|---|---|---|
| 06093 | West Suffield, CT | 4.6 mi |
| 06060 | North Granby, CT | 4.8 mi |
| 01030 | Feeding Hills, MA | 5.2 mi |
| 06035 | Granby, CT | 6.6 mi |
| 01085 | Westfield, MA | 6.9 mi |
| 06027 | East Hartland, CT | 7.6 mi |
| 01001 | Agawam, MA | 7.9 mi |
| 06078 | Suffield, CT | 8 mi |
| 06026 | East Granby, CT | 8 mi |
| 01089 | West Springfield, MA | 8.2 mi |
| 01071 | Russell, MA | 8.4 mi |
| 06090 | West Granby, CT | 8.6 mi |
Questions about 01077
What is the ZIP+4 code for 01077?
01077 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 01077, you need to look up a specific street address to get them.
What city is 01077?
01077 is assigned to Southwick, Massachusetts, in Hampden 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.