ZIP Code 13820 — Oneonta, NY
13820 is a standard (street delivery) ZIP code serving Oneonta, New York, in Otsego 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 13820 at a glance
| ZIP code | 13820 |
|---|---|
| Primary city | Oneonta |
| State | New York (NY) |
| County | Otsego FIPS 36077 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 23,056 |
| Coordinates | 42.472040, -75.038930 |
How ZIP+4 works in 13820
The four digits after the hyphen encode a delivery segment inside 13820. 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 13820 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 13820.
| ZIP | City | Distance |
|---|---|---|
| 13747 | Colliersville, NY | 3.1 mi |
| 13860 | West Davenport, NY | 4.7 mi |
| 13861 | West Oneonta, NY | 5.7 mi |
| 13834 | Portlandville, NY | 6.4 mi |
| 13806 | Meridale, NY | 7.2 mi |
| 13796 | Laurens, NY | 7.4 mi |
| 13846 | Treadwell, NY | 7.7 mi |
| 12116 | Maryland, NY | 7.9 mi |
| 13751 | Davenport Center, NY | 8 mi |
| 13825 | Otego, NY | 8.5 mi |
| 13757 | East Meredith, NY | 8.6 mi |
| 13750 | Davenport, NY | 10.2 mi |
Questions about 13820
What is the ZIP+4 code for 13820?
13820 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 13820, you need to look up a specific street address to get them.
What city is 13820?
13820 is assigned to Oneonta, New York, in Otsego 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.