ZIP Code 80550 — Windsor, CO
80550 is a standard (street delivery) ZIP code serving Windsor, Colorado, in Weld 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 80550 at a glance
| ZIP code | 80550 |
|---|---|
| Primary city | Windsor |
| State | Colorado (CO) |
| County | Weld FIPS 08123 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 46,456 |
| Coordinates | 40.482130, -104.902230 |
How ZIP+4 works in 80550
The four digits after the hyphen encode a delivery segment inside 80550. 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 80550 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 80550.
| ZIP | City | Distance |
|---|---|---|
| 80546 | Severance, CO | 4 mi |
| 80547 | Timnath, CO | 4.6 mi |
| 80528 | Fort Collins, CO | 5.2 mi |
| 80525 | Fort Collins, CO | 8 mi |
| 80634 | Greeley, CO | 8.1 mi |
| 80543 | Milliken, CO | 9.7 mi |
| 80534 | Johnstown, CO | 10.5 mi |
| 80646 | Lucerne, CO | 10.7 mi |
| 80631 | Greeley, CO | 12.1 mi |
| 80526 | Fort Collins, CO | 12.3 mi |
| 80620 | Evans, CO | 12.4 mi |
| 80524 | Fort Collins, CO | 13.1 mi |
Questions about 80550
What is the ZIP+4 code for 80550?
80550 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 80550, you need to look up a specific street address to get them.
What city is 80550?
80550 is assigned to Windsor, Colorado, in Weld 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.