ZIP Code 73065 — Newcastle, OK
73065 is a standard (street delivery) ZIP code serving Newcastle, Oklahoma, in McClain 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 73065 at a glance
| ZIP code | 73065 |
|---|---|
| Primary city | Newcastle |
| State | Oklahoma (OK) |
| County | McClain FIPS 40087 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 11,685 |
| Coordinates | 35.250080, -97.612090 |
How ZIP+4 works in 73065
The four digits after the hyphen encode a delivery segment inside 73065. 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 73065 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 73065.
| ZIP | City | Distance |
|---|---|---|
| 73173 | Oklahoma City, OK | 6.3 mi |
| 73170 | Oklahoma City, OK | 6.4 mi |
| 73072 | Norman, OK | 6.6 mi |
| 73069 | Norman, OK | 8.4 mi |
| 73169 | Oklahoma City, OK | 9.3 mi |
| 73159 | Oklahoma City, OK | 9.5 mi |
| 73160 | Oklahoma City, OK | 9.7 mi |
| 73019 | Norman, OK | 10 mi |
| 73097 | Wheatland, OK | 10.4 mi |
| 73089 | Tuttle, OK | 10.4 mi |
| 73070 | Norman, OK | 10.5 mi |
| 73139 | Oklahoma City, OK | 10.5 mi |
Questions about 73065
What is the ZIP+4 code for 73065?
73065 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 73065, you need to look up a specific street address to get them.
What city is 73065?
73065 is assigned to Newcastle, Oklahoma, in McClain 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.