ZIP Code 64840 — Diamond, MO
64840 is a standard (street delivery) ZIP code serving Diamond, Missouri, in Newton 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 64840 at a glance
| ZIP code | 64840 |
|---|---|
| Primary city | Diamond |
| State | Missouri (MO) |
| County | Newton FIPS 29145 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 3,325 |
| Coordinates | 37.018260, -94.335360 |
How ZIP+4 works in 64840
The four digits after the hyphen encode a delivery segment inside 64840. 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 64840 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 64840.
| ZIP | City | Distance |
|---|---|---|
| 64841 | Duenweg, MO | 5.9 mi |
| 64844 | Granby, MO | 8.9 mi |
| 64804 | Joplin, MO | 9.7 mi |
| 64835 | Carterville, MO | 10.6 mi |
| 64801 | Joplin, MO | 11 mi |
| 64850 | Neosho, MO | 11.4 mi |
| 64836 | Carthage, MO | 12 mi |
| 64862 | Sarcoxie, MO | 13.4 mi |
| 64858 | Racine, MO | 13.4 mi |
| 64870 | Webb City, MO | 14 mi |
| 64859 | Reeds, MO | 14.2 mi |
| 64866 | Stark City, MO | 14.8 mi |
Questions about 64840
What is the ZIP+4 code for 64840?
64840 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 64840, you need to look up a specific street address to get them.
What city is 64840?
64840 is assigned to Diamond, Missouri, in Newton 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.