ZIP Code 81243 — Powderhorn, CO
81243 is a standard (street delivery) ZIP code serving Powderhorn, Colorado, in Gunnison 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 81243 at a glance
| ZIP code | 81243 |
|---|---|
| Primary city | Powderhorn |
| State | Colorado (CO) |
| County | Gunnison FIPS 08051 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 174 |
| Coordinates | 38.260410, -107.176540 |
How ZIP+4 works in 81243
The four digits after the hyphen encode a delivery segment inside 81243. 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 81243 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 81243.
| ZIP | City | Distance |
|---|---|---|
| 81230 | Gunnison, CO | 14.6 mi |
| 81220 | Cimarron, CO | 16.9 mi |
| 81235 | Lake City, CO | 20.2 mi |
| 81427 | Ouray, CO | 31.3 mi |
| 81432 | Ridgway, CO | 32.1 mi |
| 81239 | Parlin, CO | 36.2 mi |
| 81415 | Crawford, CO | 36.2 mi |
| 81433 | Silverton, CO | 39.4 mi |
| 81237 | Ohio City, CO | 40.6 mi |
Questions about 81243
What is the ZIP+4 code for 81243?
81243 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 81243, you need to look up a specific street address to get them.
What city is 81243?
81243 is assigned to Powderhorn, Colorado, in Gunnison 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.