ZIP Code 12603 — Poughkeepsie, NY
12603 is a standard (street delivery) ZIP code serving Poughkeepsie, 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 12603 at a glance
| ZIP code | 12603 |
|---|---|
| Primary city | Poughkeepsie |
| State | New York (NY) |
| County | Dutchess FIPS 36027 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 42,304 |
| Coordinates | 41.678160, -73.867440 |
How ZIP+4 works in 12603
The four digits after the hyphen encode a delivery segment inside 12603. 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 12603 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.
Other ZIP codes in Poughkeepsie
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 12603.
| ZIP | City | Distance |
|---|---|---|
| 12604 | Poughkeepsie, NY | 1.6 mi |
| 12601 | Poughkeepsie, NY | 3 mi |
| 12569 | Pleasant Valley, NY | 5.3 mi |
| 12590 | Wappingers Falls, NY | 5.8 mi |
| 12547 | Milton, NY | 6.2 mi |
| 12540 | Lagrangeville, NY | 7.3 mi |
| 12528 | Highland, NY | 7.7 mi |
| 12538 | Hyde Park, NY | 8 mi |
| 12542 | Marlboro, NY | 8.2 mi |
| 12533 | Hopewell Junction, NY | 9 mi |
| 12585 | Verbank, NY | 9.1 mi |
| 12493 | West Park, NY | 9.6 mi |
Questions about 12603
What is the ZIP+4 code for 12603?
12603 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 12603, you need to look up a specific street address to get them.
What city is 12603?
12603 is assigned to Poughkeepsie, 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.