ZIP Code 10520 — Croton On Hudson, NY
10520 is a standard (street delivery) ZIP code serving Croton On Hudson, New York, in Westchester 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 10520 at a glance
| ZIP code | 10520 |
|---|---|
| Primary city | Croton On Hudson |
| State | New York (NY) |
| County | Westchester FIPS 36119 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 12,368 |
| Coordinates | 41.221830, -73.873480 |
How ZIP+4 works in 10520
The four digits after the hyphen encode a delivery segment inside 10520. 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 10520 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 10520.
| ZIP | City | Distance |
|---|---|---|
| 10562 | Ossining, NY | 3 mi |
| 10545 | Maryknoll, NY | 3.6 mi |
| 10548 | Montrose, NY | 3.7 mi |
| 10546 | Millwood, NY | 4.2 mi |
| 10511 | Buchanan, NY | 4.6 mi |
| 10567 | Cortlandt Manor, NY | 4.8 mi |
| 10596 | Verplanck, NY | 5 mi |
| 10566 | Peekskill, NY | 5.2 mi |
| 10517 | Crompond, NY | 5.3 mi |
| 10927 | Haverstraw, NY | 5.3 mi |
| 10993 | West Haverstraw, NY | 5.4 mi |
| 10920 | Congers, NY | 5.8 mi |
Questions about 10520
What is the ZIP+4 code for 10520?
10520 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 10520, you need to look up a specific street address to get them.
What city is 10520?
10520 is assigned to Croton On Hudson, New York, in Westchester 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.