ZIP Code 03579 — Errol, NH
03579 is a standard (street delivery) ZIP code serving Errol, New Hampshire, in Oxford 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 03579 at a glance
| ZIP code | 03579 |
|---|---|
| Primary city | Errol |
| State | New Hampshire (NH) |
| County | Oxford FIPS 23017 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 431 |
| Coordinates | 44.952340, -71.041820 |
How ZIP+4 works in 03579
The four digits after the hyphen encode a delivery segment inside 03579. 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 03579 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 03579.
| ZIP | City | Distance |
|---|---|---|
| 04964 | Oquossoc, ME | 10.1 mi |
| 03592 | Pittsburg, NH | 15.2 mi |
| 03576 | Colebrook, NH | 16.5 mi |
| 04970 | Rangeley, ME | 20.1 mi |
| 04216 | Andover, ME | 20.6 mi |
| 03597 | West Stewartstown, NH | 22.4 mi |
| 05902 | Beecher Falls, VT | 22.5 mi |
| 03588 | Milan, NH | 25.7 mi |
| 05903 | Canaan, VT | 26.4 mi |
| 04275 | Roxbury, ME | 26.8 mi |
| 03590 | North Stratford, NH | 27.3 mi |
| 04261 | Newry, ME | 27.5 mi |
Questions about 03579
What is the ZIP+4 code for 03579?
03579 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 03579, you need to look up a specific street address to get them.
What city is 03579?
03579 is assigned to Errol, New Hampshire, in Oxford 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.