ZIP Code 13803 — Marathon, NY
13803 is a standard (street delivery) ZIP code serving Marathon, New York, in Cortland 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 13803 at a glance
| ZIP code | 13803 |
|---|---|
| Primary city | Marathon |
| State | New York (NY) |
| County | Cortland FIPS 36023 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 4,273 |
| Coordinates | 42.457870, -76.060280 |
How ZIP+4 works in 13803
The four digits after the hyphen encode a delivery segment inside 13803. 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 13803 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 13803.
| ZIP | City | Distance |
|---|---|---|
| 13835 | Richford, NY | 7.3 mi |
| 13738 | Blodgett Mills, NY | 7.8 mi |
| 13863 | Willet, NY | 8 mi |
| 13784 | Harford, NY | 8.2 mi |
| 13797 | Lisle, NY | 9 mi |
| 13040 | Cincinnatus, NY | 9.7 mi |
| 13101 | Mcgraw, NY | 10 mi |
| 13862 | Whitney Point, NY | 10.4 mi |
| 13053 | Dryden, NY | 10.5 mi |
| 13045 | Cortland, NY | 11.1 mi |
| 13841 | Smithville Flats, NY | 11.5 mi |
| 13736 | Berkshire, NY | 11.9 mi |
Questions about 13803
What is the ZIP+4 code for 13803?
13803 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 13803, you need to look up a specific street address to get them.
What city is 13803?
13803 is assigned to Marathon, New York, in Cortland 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.