ZIP Code 12033 — Castleton On Hudson, NY
12033 is a standard (street delivery) ZIP code serving Castleton On Hudson, New York, in Rensselaer 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 12033 at a glance
| ZIP code | 12033 |
|---|---|
| Primary city | Castleton On Hudson |
| State | New York (NY) |
| County | Rensselaer FIPS 36083 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 7,932 |
| Coordinates | 42.536650, -73.705580 |
How ZIP+4 works in 12033
The four digits after the hyphen encode a delivery segment inside 12033. 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 12033 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 12033.
| ZIP | City | Distance |
|---|---|---|
| 12063 | East Schodack, NY | 3.9 mi |
| 12156 | Schodack Landing, NY | 4.5 mi |
| 12061 | East Greenbush, NY | 5 mi |
| 12123 | Nassau, NY | 5.1 mi |
| 12077 | Glenmont, NY | 5.6 mi |
| 12132 | North Chatham, NY | 5.8 mi |
| 12158 | Selkirk, NY | 5.8 mi |
| 12045 | Coeymans, NY | 6.1 mi |
| 12144 | Rensselaer, NY | 6.5 mi |
| 12130 | Niverville, NY | 7 mi |
| 12161 | South Bethlehem, NY | 7.1 mi |
| 12202 | Albany, NY | 7.3 mi |
Questions about 12033
What is the ZIP+4 code for 12033?
12033 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 12033, you need to look up a specific street address to get them.
What city is 12033?
12033 is assigned to Castleton On Hudson, New York, in Rensselaer 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.