ZIP Code 12545 — Millbrook, NY
12545 is a standard (street delivery) ZIP code serving Millbrook, New York, in Dutchess 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 12545 at a glance
| ZIP code | 12545 |
|---|---|
| Primary city | Millbrook |
| State | New York (NY) |
| County | Dutchess FIPS 36027 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 4,338 |
| Coordinates | 41.791400, -73.672510 |
How ZIP+4 works in 12545
The four digits after the hyphen encode a delivery segment inside 12545. 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 12545 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 12545.
| ZIP | City | Distance |
|---|---|---|
| 12585 | Verbank, NY | 4.9 mi |
| 12592 | Wassaic, NY | 6.2 mi |
| 12522 | Dover Plains, NY | 6.2 mi |
| 12578 | Salt Point, NY | 6.5 mi |
| 12514 | Clinton Corners, NY | 7.2 mi |
| 12501 | Amenia, NY | 7.4 mi |
| 12569 | Pleasant Valley, NY | 7.5 mi |
| 12581 | Stanfordville, NY | 8 mi |
| 12540 | Lagrangeville, NY | 8.8 mi |
| 12594 | Wingdale, NY | 10.7 mi |
| 12580 | Staatsburg, NY | 11.2 mi |
| 06757 | Kent, CT | 11.2 mi |
Questions about 12545
What is the ZIP+4 code for 12545?
12545 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 12545, you need to look up a specific street address to get them.
What city is 12545?
12545 is assigned to Millbrook, New York, in Dutchess 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.