ZIP Code 81321 — Cortez, CO
81321 is a standard (street delivery) ZIP code serving Cortez, Colorado, in Montezuma 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 81321 at a glance
| ZIP code | 81321 |
|---|---|
| Primary city | Cortez |
| State | Colorado (CO) |
| County | Montezuma FIPS 08083 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 14,236 |
| Coordinates | 37.318260, -108.762670 |
How ZIP+4 works in 81321
The four digits after the hyphen encode a delivery segment inside 81321. 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 81321 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 81321.
| ZIP | City | Distance |
|---|---|---|
| 81331 | Pleasant View, CO | 14.6 mi |
| 81327 | Lewis, CO | 14.6 mi |
| 81334 | Towaoc, CO | 15.6 mi |
| 81335 | Yellow Jacket, CO | 15.7 mi |
| 81330 | Mesa Verde National Park, CO | 16.6 mi |
| 81328 | Mancos, CO | 24.9 mi |
| 81324 | Dove Creek, CO | 26.4 mi |
| 81320 | Cahone, CO | 26.5 mi |
| 84534 | Montezuma Creek, UT | 28.7 mi |
| 81323 | Dolores, CO | 35 mi |
| 86514 | Teec Nos Pos, AZ | 41.8 mi |
Questions about 81321
What is the ZIP+4 code for 81321?
81321 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 81321, you need to look up a specific street address to get them.
What city is 81321?
81321 is assigned to Cortez, Colorado, in Montezuma 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.