ZIP Code 74637 — Fairfax, OK
74637 is a standard (street delivery) ZIP code serving Fairfax, Oklahoma, in Osage 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 74637 at a glance
| ZIP code | 74637 |
|---|---|
| Primary city | Fairfax |
| State | Oklahoma (OK) |
| County | Osage FIPS 40113 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,510 |
| Coordinates | 36.590830, -96.681720 |
How ZIP+4 works in 74637
The four digits after the hyphen encode a delivery segment inside 74637. 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 74637 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 74637.
| ZIP | City | Distance |
|---|---|---|
| 74650 | Ralston, OK | 8 mi |
| 74633 | Burbank, OK | 10 mi |
| 74058 | Pawnee, OK | 16.8 mi |
| 74604 | Ponca City, OK | 18.1 mi |
| 74641 | Kaw City, OK | 18.4 mi |
| 74652 | Shidler, OK | 18.4 mi |
| 74084 | Wynona, OK | 19.8 mi |
| 74035 | Hominy, OK | 21.3 mi |
| 74644 | Marland, OK | 23.2 mi |
| 74056 | Pawhuska, OK | 23.7 mi |
| 73061 | Morrison, OK | 25 mi |
| 74045 | Maramec, OK | 25.5 mi |
Questions about 74637
What is the ZIP+4 code for 74637?
74637 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 74637, you need to look up a specific street address to get them.
What city is 74637?
74637 is assigned to Fairfax, Oklahoma, in Osage 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.