ZIP Code 12821 — Comstock, NY
12821 is a standard (street delivery) ZIP code serving Comstock, New York, in Washington 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 12821 at a glance
| ZIP code | 12821 |
|---|---|
| Primary city | Comstock |
| State | New York (NY) |
| County | Washington FIPS 36115 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 2,124 |
| Coordinates | 43.458660, -73.413320 |
How ZIP+4 works in 12821
The four digits after the hyphen encode a delivery segment inside 12821. 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 12821 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 12821.
| ZIP | City | Distance |
|---|---|---|
| 12854 | North Granville, NY | 4.3 mi |
| 12827 | Fort Ann, NY | 5 mi |
| 12849 | Middle Granville, NY | 5.8 mi |
| 12887 | Whitehall, NY | 6.3 mi |
| 12838 | Hartford, NY | 7.9 mi |
| 12832 | Granville, NY | 7.9 mi |
| 12837 | Hampton, NY | 8.1 mi |
| 12839 | Hudson Falls, NY | 10.4 mi |
| 12819 | Clemons, NY | 10.8 mi |
| 12841 | Huletts Landing, NY | 11 mi |
| 12820 | Cleverdale, NY | 11.4 mi |
| 05775 | West Pawlet, VT | 11.7 mi |
Questions about 12821
What is the ZIP+4 code for 12821?
12821 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 12821, you need to look up a specific street address to get them.
What city is 12821?
12821 is assigned to Comstock, New York, in Washington 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.