ZIP Code 03911 — York Harbor, ME
03911 is a standard (street delivery) ZIP code serving York Harbor, Maine, in York 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 03911 at a glance
| ZIP code | 03911 |
|---|---|
| Primary city | York Harbor |
| State | Maine (ME) |
| County | York FIPS 23031 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 363 |
| Coordinates | 43.134240, -70.636950 |
How ZIP+4 works in 03911
The four digits after the hyphen encode a delivery segment inside 03911. 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 03911 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 03911.
| ZIP | City | Distance |
|---|---|---|
| 03910 | York Beach, ME | 3.1 mi |
| 03909 | York, ME | 3.2 mi |
| 03905 | Kittery Point, ME | 4.2 mi |
| 03904 | Kittery, ME | 5.1 mi |
| 03902 | Cape Neddick, ME | 6.1 mi |
| 03854 | New Castle, NH | 6.3 mi |
| 03903 | Eliot, ME | 7.6 mi |
| 03907 | Ogunquit, ME | 8.4 mi |
| 03908 | South Berwick, ME | 9.1 mi |
| 03801 | Portsmouth, NH | 9.5 mi |
| 03870 | Rye, NH | 10.3 mi |
| 03869 | Rollinsford, NH | 11.8 mi |
Questions about 03911
What is the ZIP+4 code for 03911?
03911 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 03911, you need to look up a specific street address to get them.
What city is 03911?
03911 is assigned to York Harbor, Maine, in York 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.