ZIP Code 73666 — Sweetwater, OK
73666 is a standard (street delivery) ZIP code serving Sweetwater, Oklahoma, in Roger Mills 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 73666 at a glance
| ZIP code | 73666 |
|---|---|
| Primary city | Sweetwater |
| State | Oklahoma (OK) |
| County | Roger Mills FIPS 40129 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 329 |
| Coordinates | 35.420360, -99.924120 |
How ZIP+4 works in 73666
The four digits after the hyphen encode a delivery segment inside 73666. 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 73666 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 73666.
| ZIP | City | Distance |
|---|---|---|
| 73668 | Texola, OK | 14 mi |
| 73660 | Reydon, OK | 14.2 mi |
| 79096 | Wheeler, TX | 15.6 mi |
| 73662 | Sayre, OK | 16.4 mi |
| 73645 | Erick, OK | 17.6 mi |
| 79003 | Allison, TX | 17.7 mi |
| 73628 | Cheyenne, OK | 19.5 mi |
| 79011 | Briscoe, TX | 21.6 mi |
| 79079 | Shamrock, TX | 23.4 mi |
| 73642 | Durham, OK | 27.5 mi |
| 73644 | Elk City, OK | 28 mi |
| 73673 | Willow, OK | 30.4 mi |
Questions about 73666
What is the ZIP+4 code for 73666?
73666 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 73666, you need to look up a specific street address to get them.
What city is 73666?
73666 is assigned to Sweetwater, Oklahoma, in Roger Mills 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.