ZIP Code 82421 — Deaver, WY
82421 is a standard (street delivery) ZIP code serving Deaver, Wyoming, in Park 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 82421 at a glance
| ZIP code | 82421 |
|---|---|
| Primary city | Deaver |
| State | Wyoming (WY) |
| County | Park FIPS 56029 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 379 |
| Coordinates | 44.883990, -108.604970 |
How ZIP+4 works in 82421
The four digits after the hyphen encode a delivery segment inside 82421. 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 82421 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 82421.
| ZIP | City | Distance |
|---|---|---|
| 82423 | Frannie, WY | 6.7 mi |
| 82412 | Byron, WY | 7 mi |
| 82420 | Cowley, WY | 7.5 mi |
| 82440 | Ralston, WY | 17.2 mi |
| 59014 | Bridger, MT | 18.8 mi |
| 82435 | Powell, WY | 21.4 mi |
| 82431 | Lovell, WY | 21.7 mi |
| 59008 | Belfry, MT | 26.7 mi |
| 82422 | Emblem, WY | 28.8 mi |
| 82411 | Burlington, WY | 30.6 mi |
| 59066 | Pryor, MT | 31.8 mi |
| 59007 | Bearcreek, MT | 32.9 mi |
Questions about 82421
What is the ZIP+4 code for 82421?
82421 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 82421, you need to look up a specific street address to get them.
What city is 82421?
82421 is assigned to Deaver, Wyoming, in Park 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.