ZIP Code 03240 — Grafton, NH
03240 is a standard (street delivery) ZIP code serving Grafton, New Hampshire, in Grafton 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 03240 at a glance
| ZIP code | 03240 |
|---|---|
| Primary city | Grafton |
| State | New Hampshire (NH) |
| County | Grafton FIPS 33009 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,354 |
| Coordinates | 43.575990, -71.972210 |
How ZIP+4 works in 03240
The four digits after the hyphen encode a delivery segment inside 03240. 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 03240 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 03240.
| ZIP | City | Distance |
|---|---|---|
| 03284 | Springfield, NH | 6.4 mi |
| 03230 | Danbury, NH | 6.5 mi |
| 03741 | Canaan, NH | 6.9 mi |
| 03748 | Enfield, NH | 7.5 mi |
| 03287 | Wilmot, NH | 9 mi |
| 03753 | Grantham, NH | 9.7 mi |
| 03222 | Bristol, NH | 10.2 mi |
| 03233 | Elkins, NH | 10.7 mi |
| 03751 | Georges Mills, NH | 10.7 mi |
| 03243 | Hill, NH | 10.9 mi |
| 03257 | New London, NH | 11 mi |
| 03241 | Hebron, NH | 12.1 mi |
Questions about 03240
What is the ZIP+4 code for 03240?
03240 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 03240, you need to look up a specific street address to get them.
What city is 03240?
03240 is assigned to Grafton, New Hampshire, in Grafton 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.