ZIP Code 81137 — Ignacio, CO
81137 is a standard (street delivery) ZIP code serving Ignacio, Colorado, in La Plata 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 81137 at a glance
| ZIP code | 81137 |
|---|---|
| Primary city | Ignacio |
| State | Colorado (CO) |
| County | La Plata FIPS 08067 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 5,571 |
| Coordinates | 37.055550, -107.615960 |
How ZIP+4 works in 81137
The four digits after the hyphen encode a delivery segment inside 81137. 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 81137 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 81137.
| ZIP | City | Distance |
|---|---|---|
| 81121 | Arboles, CO | 11.1 mi |
| 87419 | Navajo Dam, NM | 12.1 mi |
| 81303 | Durango, CO | 14.2 mi |
| 81122 | Bayfield, CO | 19.1 mi |
| 87410 | Aztec, NM | 20.1 mi |
| 87412 | Blanco, NM | 28 mi |
| 81326 | Hesperus, CO | 28.2 mi |
| 87418 | La Plata, NM | 30.2 mi |
| 87415 | Flora Vista, NM | 31 mi |
| 81147 | Pagosa Springs, CO | 33.4 mi |
| 81301 | Durango, CO | 33.4 mi |
| 87402 | Farmington, NM | 34.5 mi |
Questions about 81137
What is the ZIP+4 code for 81137?
81137 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 81137, you need to look up a specific street address to get them.
What city is 81137?
81137 is assigned to Ignacio, Colorado, in La Plata 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.