ZIP Code 65321 — Blackburn, MO
65321 is a standard (street delivery) ZIP code serving Blackburn, Missouri, in Saline 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 65321 at a glance
| ZIP code | 65321 |
|---|---|
| Primary city | Blackburn |
| State | Missouri (MO) |
| County | Saline FIPS 29195 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 405 |
| Coordinates | 39.086040, -93.452600 |
How ZIP+4 works in 65321
The four digits after the hyphen encode a delivery segment inside 65321. 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 65321 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 65321.
| ZIP | City | Distance |
|---|---|---|
| 64001 | Alma, MO | 4.7 mi |
| 65351 | Sweet Springs, MO | 7.9 mi |
| 65327 | Emma, MO | 7.9 mi |
| 65339 | Malta Bend, MO | 8.5 mi |
| 64021 | Corder, MO | 9.4 mi |
| 64096 | Waverly, MO | 9.7 mi |
| 64020 | Concordia, MO | 11 mi |
| 64022 | Dover, MO | 14.5 mi |
| 65340 | Marshall, MO | 14.6 mi |
| 65333 | Houstonia, MO | 14.6 mi |
| 64037 | Higginsville, MO | 15.3 mi |
| 64633 | Carrollton, MO | 18.9 mi |
Questions about 65321
What is the ZIP+4 code for 65321?
65321 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 65321, you need to look up a specific street address to get them.
What city is 65321?
65321 is assigned to Blackburn, Missouri, in Saline 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.