ZIP Code 01378 — Warwick, MA
01378 is a standard (street delivery) ZIP code serving Warwick, Massachusetts, in Franklin 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 01378 at a glance
| ZIP code | 01378 |
|---|---|
| Primary city | Warwick |
| State | Massachusetts (MA) |
| County | Franklin FIPS 25011 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 776 |
| Coordinates | 42.677110, -72.340570 |
How ZIP+4 works in 01378
The four digits after the hyphen encode a delivery segment inside 01378. 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 01378 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 01378.
| ZIP | City | Distance |
|---|---|---|
| 01360 | Northfield, MA | 5.3 mi |
| 01364 | Orange, MA | 5.6 mi |
| 01344 | Erving, MA | 6.6 mi |
| 03470 | Winchester, NH | 7 mi |
| 01380 | Wendell Depot, MA | 7 mi |
| 01368 | Royalston, MA | 7.9 mi |
| 03441 | Ashuelot, NH | 8.6 mi |
| 01354 | Gill, MA | 9.2 mi |
| 01379 | Wendell, MA | 9.8 mi |
| 01349 | Millers Falls, MA | 10.1 mi |
| 01331 | Athol, MA | 11 mi |
| 05354 | Vernon, VT | 11.1 mi |
Questions about 01378
What is the ZIP+4 code for 01378?
01378 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 01378, you need to look up a specific street address to get them.
What city is 01378?
01378 is assigned to Warwick, Massachusetts, in Franklin 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.