ZIP Code 80421 — Bailey, CO
80421 is a standard (street delivery) ZIP code serving Bailey, Colorado, 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 80421 at a glance
| ZIP code | 80421 |
|---|---|
| Primary city | Bailey |
| State | Colorado (CO) |
| County | Park FIPS 08093 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 8,536 |
| Coordinates | 39.481660, -105.504620 |
How ZIP+4 works in 80421
The four digits after the hyphen encode a delivery segment inside 80421. 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 80421 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 80421.
| ZIP | City | Distance |
|---|---|---|
| 80475 | Shawnee, CO | 5.9 mi |
| 80448 | Grant, CO | 8.3 mi |
| 80470 | Pine, CO | 10.1 mi |
| 80433 | Conifer, CO | 11.2 mi |
| 80439 | Evergreen, CO | 11.3 mi |
| 80456 | Jefferson, CO | 15.7 mi |
| 80444 | Georgetown, CO | 15.9 mi |
| 80457 | Kittredge, CO | 16 mi |
| 80452 | Idaho Springs, CO | 16.5 mi |
| 80454 | Indian Hills, CO | 16.9 mi |
| 80425 | Buffalo Creek, CO | 17.2 mi |
| 80465 | Morrison, CO | 17.6 mi |
Questions about 80421
What is the ZIP+4 code for 80421?
80421 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 80421, you need to look up a specific street address to get them.
What city is 80421?
80421 is assigned to Bailey, Colorado, 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.