ZIP Code 82643 — Midwest, WY
82643 is a standard (street delivery) ZIP code serving Midwest, Wyoming, in Natrona 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 82643 at a glance
| ZIP code | 82643 |
|---|---|
| Primary city | Midwest |
| State | Wyoming (WY) |
| County | Natrona FIPS 56025 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 267 |
| Coordinates | 43.439730, -106.273590 |
How ZIP+4 works in 82643
The four digits after the hyphen encode a delivery segment inside 82643. 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 82643 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 82643.
| ZIP | City | Distance |
|---|---|---|
| 82635 | Edgerton, WY | 3 mi |
| 82640 | Linch, WY | 11 mi |
| 82601 | Casper, WY | 26.1 mi |
| 82639 | Kaycee, WY | 29.5 mi |
| 82646 | Natrona, WY | 42 mi |
Questions about 82643
What is the ZIP+4 code for 82643?
82643 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 82643, you need to look up a specific street address to get them.
What city is 82643?
82643 is assigned to Midwest, Wyoming, in Natrona 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.