ZIP Code 81057 — Mcclave, CO
81057 is a standard (street delivery) ZIP code serving Mcclave, Colorado, in Bent 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 81057 at a glance
| ZIP code | 81057 |
|---|---|
| Primary city | Mcclave |
| State | Colorado (CO) |
| County | Bent FIPS 08011 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 450 |
| Coordinates | 38.125250, -102.896750 |
How ZIP+4 works in 81057
The four digits after the hyphen encode a delivery segment inside 81057. 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 81057 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 81057.
| ZIP | City | Distance |
|---|---|---|
| 81092 | Wiley, CO | 5.6 mi |
| 81044 | Hasty, CO | 15.5 mi |
| 81052 | Lamar, CO | 18.2 mi |
| 81036 | Eads, CO | 21.8 mi |
| 81054 | Las Animas, CO | 23.1 mi |
| 81021 | Arlington, CO | 33.2 mi |
| 81045 | Haswell, CO | 33.2 mi |
| 81041 | Granada, CO | 33.9 mi |
Questions about 81057
What is the ZIP+4 code for 81057?
81057 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 81057, you need to look up a specific street address to get them.
What city is 81057?
81057 is assigned to Mcclave, Colorado, in Bent 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.