ZIP Code 15321 — Cecil, PA
15321 is a standard (street delivery) ZIP code serving Cecil, Pennsylvania, in Washington 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 15321 at a glance
| ZIP code | 15321 |
|---|---|
| Primary city | Cecil |
| State | Pennsylvania (PA) |
| County | Washington FIPS 42125 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 2,025 |
| Coordinates | 40.321670, -80.187160 |
How ZIP+4 works in 15321
The four digits after the hyphen encode a delivery segment inside 15321. 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 15321 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 15321.
| ZIP | City | Distance |
|---|---|---|
| 15350 | Muse, PA | 2.1 mi |
| 15031 | Cuddy, PA | 2.2 mi |
| 15064 | Morgan, PA | 3.1 mi |
| 15017 | Bridgeville, PA | 3.4 mi |
| 15055 | Lawrence, PA | 3.5 mi |
| 15317 | Canonsburg, PA | 3.7 mi |
| 15057 | Mcdonald, PA | 3.9 mi |
| 15361 | Southview, PA | 4 mi |
| 15082 | Sturgeon, PA | 4.2 mi |
| 15363 | Strabane, PA | 4.9 mi |
| 15241 | Pittsburgh, PA | 5.5 mi |
| 15378 | Westland, PA | 5.5 mi |
Questions about 15321
What is the ZIP+4 code for 15321?
15321 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 15321, you need to look up a specific street address to get them.
What city is 15321?
15321 is assigned to Cecil, Pennsylvania, in Washington 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.