ZIP Code 72845 — Knoxville, AR
72845 is a standard (street delivery) ZIP code serving Knoxville, Arkansas, in Johnson 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 72845 at a glance
| ZIP code | 72845 |
|---|---|
| Primary city | Knoxville |
| State | Arkansas (AR) |
| County | Johnson FIPS 05071 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,063 |
| Coordinates | 35.362620, -93.376190 |
How ZIP+4 works in 72845
The four digits after the hyphen encode a delivery segment inside 72845. 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 72845 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 72845.
| ZIP | City | Distance |
|---|---|---|
| 72847 | London, AR | 5.6 mi |
| 72835 | Delaware, AR | 6.2 mi |
| 72863 | Scranton, AR | 7.5 mi |
| 72851 | New Blaine, AR | 8.4 mi |
| 72846 | Lamar, AR | 8.8 mi |
| 72865 | Subiaco, AR | 11.3 mi |
| 72830 | Clarksville, AR | 13 mi |
| 72801 | Russellville, AR | 14.4 mi |
| 72840 | Hartman, AR | 15 mi |
| 72824 | Belleville, AR | 16.3 mi |
| 72834 | Dardanelle, AR | 16.7 mi |
| 72832 | Coal Hill, AR | 17.2 mi |
Questions about 72845
What is the ZIP+4 code for 72845?
72845 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 72845, you need to look up a specific street address to get them.
What city is 72845?
72845 is assigned to Knoxville, Arkansas, in Johnson 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.