ZIP Code 12857 — Olmstedville, NY
12857 is a standard (street delivery) ZIP code serving Olmstedville, New York, in Essex 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 12857 at a glance
| ZIP code | 12857 |
|---|---|
| Primary city | Olmstedville |
| State | New York (NY) |
| County | Essex FIPS 36031 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 606 |
| Coordinates | 43.840330, -73.933540 |
How ZIP+4 works in 12857
The four digits after the hyphen encode a delivery segment inside 12857. 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 12857 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 12857.
| ZIP | City | Distance |
|---|---|---|
| 12851 | Minerva, NY | 6.4 mi |
| 12870 | Schroon Lake, NY | 8.5 mi |
| 12860 | Pottersville, NY | 9.9 mi |
| 12872 | Severance, NY | 10.9 mi |
| 12808 | Adirondack, NY | 11 mi |
| 12853 | North Creek, NY | 11 mi |
| 12862 | Riparius, NY | 11.5 mi |
| 12855 | North Hudson, NY | 13 mi |
| 12858 | Paradox, NY | 13.5 mi |
| 12886 | Wevertown, NY | 14 mi |
| 12852 | Newcomb, NY | 14.6 mi |
| 12817 | Chestertown, NY | 15 mi |
Questions about 12857
What is the ZIP+4 code for 12857?
12857 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 12857, you need to look up a specific street address to get them.
What city is 12857?
12857 is assigned to Olmstedville, New York, in Essex 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.