ZIP Code 16333 — Ludlow, PA
16333 is a standard (street delivery) ZIP code serving Ludlow, Pennsylvania, in McKean 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 16333 at a glance
| ZIP code | 16333 |
|---|---|
| Primary city | Ludlow |
| State | Pennsylvania (PA) |
| County | McKean FIPS 42083 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 248 |
| Coordinates | 41.749220, -78.932300 |
How ZIP+4 works in 16333
The four digits after the hyphen encode a delivery segment inside 16333. 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 16333 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 16333.
| ZIP | City | Distance |
|---|---|---|
| 16352 | Tiona, PA | 5.5 mi |
| 16347 | Sheffield, PA | 9.8 mi |
| 16734 | James City, PA | 10.1 mi |
| 16735 | Kane, PA | 10.3 mi |
| 16738 | Lewis Run, PA | 10.7 mi |
| 16313 | Clarendon, PA | 10.8 mi |
| 16365 | Warren, PA | 13 mi |
| 16701 | Bradford, PA | 13.8 mi |
| 16345 | Russell, PA | 15.7 mi |
| 16725 | Custer City, PA | 17.3 mi |
| 16733 | Hazel Hurst, PA | 17.6 mi |
| 16329 | Irvine, PA | 18.2 mi |
Questions about 16333
What is the ZIP+4 code for 16333?
16333 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 16333, you need to look up a specific street address to get them.
What city is 16333?
16333 is assigned to Ludlow, Pennsylvania, in McKean 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.