ZIP Code 64420 — Allendale, MO
64420 is a standard (street delivery) ZIP code serving Allendale, Missouri, in Worth 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 64420 at a glance
| ZIP code | 64420 |
|---|---|
| Primary city | Allendale |
| State | Missouri (MO) |
| County | Worth FIPS 29227 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 31 |
| Coordinates | 40.486450, -94.289200 |
How ZIP+4 works in 64420
The four digits after the hyphen encode a delivery segment inside 64420. 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 64420 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 64420.
| ZIP | City | Distance |
|---|---|---|
| 64456 | Grant City, MO | 5.2 mi |
| 64441 | Denver, MO | 6.2 mi |
| 64458 | Hatfield, MO | 8 mi |
| 64467 | Martinsville, MO | 9 mi |
| 64499 | Worth, MO | 9 mi |
| 50860 | Redding, IA | 9.9 mi |
| 64453 | Gentry, MO | 13.6 mi |
| 50854 | Mount Ayr, IA | 14.6 mi |
| 50836 | Blockton, IA | 14.8 mi |
| 64442 | Eagleville, MO | 14.9 mi |
| 50835 | Benton, IA | 15.8 mi |
| 64471 | New Hampton, MO | 16.1 mi |
Questions about 64420
What is the ZIP+4 code for 64420?
64420 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 64420, you need to look up a specific street address to get them.
What city is 64420?
64420 is assigned to Allendale, Missouri, in Worth 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.