ZIP Code 16240 — Mayport, PA
16240 is a standard (street delivery) ZIP code serving Mayport, Pennsylvania, in Jefferson 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 16240 at a glance
| ZIP code | 16240 |
|---|---|
| Primary city | Mayport |
| State | Pennsylvania (PA) |
| County | Jefferson FIPS 42065 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,327 |
| Coordinates | 41.033160, -79.224320 |
How ZIP+4 works in 16240
The four digits after the hyphen encode a delivery segment inside 16240. 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 16240 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 16240.
| ZIP | City | Distance |
|---|---|---|
| 16230 | Hawthorn, PA | 2.9 mi |
| 16224 | Fairmount City, PA | 4.1 mi |
| 16245 | Oak Ridge, PA | 4.2 mi |
| 15770 | Ringgold, PA | 4.4 mi |
| 15784 | Worthville, PA | 4.5 mi |
| 15778 | Timblin, PA | 4.7 mi |
| 15864 | Summerville, PA | 4.8 mi |
| 15776 | Sprankle Mills, PA | 5.9 mi |
| 16242 | New Bethlehem, PA | 7.1 mi |
| 16223 | Distant, PA | 7.5 mi |
| 15730 | Coolspring, PA | 7.6 mi |
| 16253 | Seminole, PA | 8.2 mi |
Questions about 16240
What is the ZIP+4 code for 16240?
16240 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 16240, you need to look up a specific street address to get them.
What city is 16240?
16240 is assigned to Mayport, Pennsylvania, in Jefferson 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.