ZIP Code 12903 — Plattsburgh, NY
12903 is a standard (street delivery) ZIP code serving Plattsburgh, New York, in Clinton 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 12903 at a glance
| ZIP code | 12903 |
|---|---|
| Primary city | Plattsburgh |
| State | New York (NY) |
| County | Clinton FIPS 36019 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,824 |
| Coordinates | 44.656980, -73.463060 |
How ZIP+4 works in 12903
The four digits after the hyphen encode a delivery segment inside 12903. 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 12903 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.
Other ZIP codes in Plattsburgh
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 12903.
| ZIP | City | Distance |
|---|---|---|
| 12901 | Plattsburgh, NY | 3.6 mi |
| 05486 | South Hero, VT | 7.5 mi |
| 12962 | Morrisonville, NY | 7.6 mi |
| 12972 | Peru, NY | 8.4 mi |
| 12911 | Keeseville, NY | 8.4 mi |
| 12975 | Port Kent, NY | 8.9 mi |
| 05458 | Grand Isle, VT | 9.1 mi |
| 12918 | Cadyville, NY | 10.8 mi |
| 12992 | West Chazy, NY | 11.4 mi |
| 12929 | Dannemora, NY | 13.3 mi |
| 12924 | Keeseville, NY | 13.9 mi |
| 05446 | Colchester, VT | 14 mi |
Questions about 12903
What is the ZIP+4 code for 12903?
12903 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 12903, you need to look up a specific street address to get them.
What city is 12903?
12903 is assigned to Plattsburgh, New York, in Clinton 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.