ZIP Code 65606 — Alton, MO
65606 is a standard (street delivery) ZIP code serving Alton, Missouri, in Oregon 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 65606 at a glance
| ZIP code | 65606 |
|---|---|
| Primary city | Alton |
| State | Missouri (MO) |
| County | Oregon FIPS 29149 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,381 |
| Coordinates | 36.696340, -91.358600 |
How ZIP+4 works in 65606
The four digits after the hyphen encode a delivery segment inside 65606. 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 65606 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 65606.
| ZIP | City | Distance |
|---|---|---|
| 65690 | Couch, MO | 9.2 mi |
| 65791 | Thayer, MO | 11.7 mi |
| 65778 | Myrtle, MO | 12.5 mi |
| 63941 | Fremont, MO | 16.1 mi |
| 65692 | Koshkonong, MO | 17.3 mi |
| 63942 | Gatewood, MO | 18.3 mi |
| 65588 | Winona, MO | 18.6 mi |
| 65438 | Birch Tree, MO | 18.6 mi |
| 65688 | Brandsville, MO | 18.8 mi |
| 65788 | Peace Valley, MO | 20.4 mi |
| 72554 | Mammoth Spring, AR | 20.9 mi |
| 72478 | Warm Springs, AR | 23.3 mi |
Questions about 65606
What is the ZIP+4 code for 65606?
65606 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 65606, you need to look up a specific street address to get them.
What city is 65606?
65606 is assigned to Alton, Missouri, in Oregon 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.