ZIP Code 73018 — Chickasha, OK
73018 is a standard (street delivery) ZIP code serving Chickasha, Oklahoma, in Grady 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 73018 at a glance
| ZIP code | 73018 |
|---|---|
| Primary city | Chickasha |
| State | Oklahoma (OK) |
| County | Grady FIPS 40051 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 20,505 |
| Coordinates | 35.048400, -97.938390 |
How ZIP+4 works in 73018
The four digits after the hyphen encode a delivery segment inside 73018. 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 73018 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 73018.
| ZIP | City | Distance |
|---|---|---|
| 73004 | Amber, OK | 8.7 mi |
| 73092 | Verden, OK | 9.9 mi |
| 73067 | Ninnekah, OK | 10.2 mi |
| 73079 | Pocasset, OK | 11.9 mi |
| 73017 | Cement, OK | 12.2 mi |
| 73002 | Alex, OK | 13 mi |
| 73010 | Blanchard, OK | 15.5 mi |
| 73005 | Anadarko, OK | 16.9 mi |
| 73089 | Tuttle, OK | 17 mi |
| 73031 | Dibble, OK | 17.4 mi |
| 73011 | Bradley, OK | 17.9 mi |
| 73029 | Cyril, OK | 18.5 mi |
Questions about 73018
What is the ZIP+4 code for 73018?
73018 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 73018, you need to look up a specific street address to get them.
What city is 73018?
73018 is assigned to Chickasha, Oklahoma, in Grady 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.