ZIP Code 82420 — Cowley, WY
82420 is a standard (street delivery) ZIP code serving Cowley, Wyoming, in Big Horn 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 82420 at a glance
| ZIP code | 82420 |
|---|---|
| Primary city | Cowley |
| State | Wyoming (WY) |
| County | Big Horn FIPS 56003 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 822 |
| Coordinates | 44.922540, -108.461490 |
How ZIP+4 works in 82420
The four digits after the hyphen encode a delivery segment inside 82420. 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 82420 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 82420.
| ZIP | City | Distance |
|---|---|---|
| 82423 | Frannie, WY | 7.2 mi |
| 82421 | Deaver, WY | 7.5 mi |
| 82412 | Byron, WY | 10.2 mi |
| 82431 | Lovell, WY | 15.1 mi |
| 59014 | Bridger, MT | 18.8 mi |
| 82440 | Ralston, WY | 24.4 mi |
| 82435 | Powell, WY | 28.8 mi |
| 59066 | Pryor, MT | 28.8 mi |
| 82422 | Emblem, WY | 29.6 mi |
| 82411 | Burlington, WY | 32.6 mi |
| 82426 | Greybull, WY | 35.1 mi |
| 59035 | Fort Smith, MT | 35.7 mi |
Questions about 82420
What is the ZIP+4 code for 82420?
82420 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 82420, you need to look up a specific street address to get them.
What city is 82420?
82420 is assigned to Cowley, Wyoming, in Big Horn 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.