ZIP Code 73021 — Colony, OK
73021 is a standard (street delivery) ZIP code serving Colony, Oklahoma, in Washita 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 73021 at a glance
| ZIP code | 73021 |
|---|---|
| Primary city | Colony |
| State | Oklahoma (OK) |
| County | Washita FIPS 40149 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 241 |
| Coordinates | 35.338020, -98.670070 |
How ZIP+4 works in 73021
The four digits after the hyphen encode a delivery segment inside 73021. 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 73021 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 73021.
| ZIP | City | Distance |
|---|---|---|
| 73033 | Eakly, OK | 6.8 mi |
| 73024 | Corn, OK | 8.4 mi |
| 73048 | Hydro, OK | 12.3 mi |
| 73096 | Weatherford, OK | 12.5 mi |
| 73632 | Cordell, OK | 14.2 mi |
| 73053 | Lookeba, OK | 14.3 mi |
| 73001 | Albert, OK | 16.2 mi |
| 73009 | Binger, OK | 17.3 mi |
| 73015 | Carnegie, OK | 18.6 mi |
| 73622 | Bessie, OK | 18.9 mi |
| 73601 | Clinton, OK | 19.1 mi |
| 73038 | Fort Cobb, OK | 19.7 mi |
Questions about 73021
What is the ZIP+4 code for 73021?
73021 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 73021, you need to look up a specific street address to get them.
What city is 73021?
73021 is assigned to Colony, Oklahoma, in Washita 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.