ZIP Code 81431 — Redvale, CO
81431 is a standard (street delivery) ZIP code serving Redvale, Colorado, in San Miguel 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 81431 at a glance
| ZIP code | 81431 |
|---|---|
| Primary city | Redvale |
| State | Colorado (CO) |
| County | San Miguel FIPS 08113 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 745 |
| Coordinates | 38.138080, -108.514290 |
How ZIP+4 works in 81431
The four digits after the hyphen encode a delivery segment inside 81431. 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 81431 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 81431.
| ZIP | City | Distance |
|---|---|---|
| 81423 | Norwood, CO | 7.5 mi |
| 81424 | Nucla, CO | 14.2 mi |
| 81422 | Naturita, CO | 16.4 mi |
| 81325 | Egnar, CO | 20.1 mi |
| 81429 | Paradox, CO | 25.5 mi |
| 81430 | Placerville, CO | 25.7 mi |
| 81411 | Bedrock, CO | 26.4 mi |
| 81320 | Cahone, CO | 32.3 mi |
| 81425 | Olathe, CO | 33.1 mi |
| 81403 | Montrose, CO | 34.3 mi |
| 81435 | Telluride, CO | 36 mi |
| 81323 | Dolores, CO | 36.1 mi |
Questions about 81431
What is the ZIP+4 code for 81431?
81431 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 81431, you need to look up a specific street address to get them.
What city is 81431?
81431 is assigned to Redvale, Colorado, in San Miguel 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.