ZIP Code 74021 — Collinsville, OK
74021 is a standard (street delivery) ZIP code serving Collinsville, Oklahoma, in Tulsa 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 74021 at a glance
| ZIP code | 74021 |
|---|---|
| Primary city | Collinsville |
| State | Oklahoma (OK) |
| County | Tulsa FIPS 40143 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 23,628 |
| Coordinates | 36.379150, -95.847580 |
How ZIP+4 works in 74021
The four digits after the hyphen encode a delivery segment inside 74021. 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 74021 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 74021.
| ZIP | City | Distance |
|---|---|---|
| 74082 | Vera, OK | 5.2 mi |
| 74055 | Owasso, OK | 7.2 mi |
| 74053 | Oologah, OK | 7.4 mi |
| 74117 | Tulsa, OK | 9.9 mi |
| 74073 | Sperry, OK | 10.8 mi |
| 74130 | Tulsa, OK | 11.2 mi |
| 74061 | Ramona, OK | 11.3 mi |
| 74080 | Talala, OK | 11.9 mi |
| 74070 | Skiatook, OK | 12.5 mi |
| 74116 | Tulsa, OK | 13.2 mi |
| 74115 | Tulsa, OK | 13.3 mi |
| 74001 | Avant, OK | 14.1 mi |
Questions about 74021
What is the ZIP+4 code for 74021?
74021 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 74021, you need to look up a specific street address to get them.
What city is 74021?
74021 is assigned to Collinsville, Oklahoma, in Tulsa 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.