ZIP Code 87421 — Waterflow, NM
87421 is a standard (street delivery) ZIP code serving Waterflow, New Mexico, in San Juan 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 87421 at a glance
| ZIP code | 87421 |
|---|---|
| Primary city | Waterflow |
| State | New Mexico (NM) |
| County | San Juan FIPS 35045 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 1,468 |
| Coordinates | 36.777200, -108.536760 |
How ZIP+4 works in 87421
The four digits after the hyphen encode a delivery segment inside 87421. 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 87421 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 87421.
| ZIP | City | Distance |
|---|---|---|
| 87417 | Kirtland, NM | 10.8 mi |
| 87416 | Fruitland, NM | 14.2 mi |
| 87420 | Shiprock, NM | 17.4 mi |
| 87401 | Farmington, NM | 19.7 mi |
| 87402 | Farmington, NM | 21.5 mi |
| 81334 | Towaoc, CO | 24 mi |
| 87415 | Flora Vista, NM | 24.3 mi |
| 87418 | La Plata, NM | 24.6 mi |
| 87461 | Sanostee, NM | 31.3 mi |
| 81330 | Mesa Verde National Park, CO | 31.7 mi |
| 81326 | Hesperus, CO | 34.5 mi |
| 87499 | Farmington, NM | 35.3 mi |
Questions about 87421
What is the ZIP+4 code for 87421?
87421 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 87421, you need to look up a specific street address to get them.
What city is 87421?
87421 is assigned to Waterflow, New Mexico, in San Juan 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?
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