ZIP Code 83423 — Dubois, ID
83423 is a standard (street delivery) ZIP code serving Dubois, Idaho, in Clark 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 83423 at a glance
| ZIP code | 83423 |
|---|---|
| Primary city | Dubois |
| State | Idaho (ID) |
| County | Clark FIPS 16033 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Boise |
| Population | 729 |
| Coordinates | 44.339670, -112.331990 |
How ZIP+4 works in 83423
The four digits after the hyphen encode a delivery segment inside 83423. 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 83423 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 83423.
| ZIP | City | Distance |
|---|---|---|
| 83446 | Spencer, ID | 6.2 mi |
| 59739 | Lima, MT | 23.1 mi |
| 83435 | Monteview, ID | 27.4 mi |
| 83425 | Hamer, ID | 28.8 mi |
| 59724 | Dell, MT | 32.6 mi |
| 83450 | Terreton, ID | 34.3 mi |
| 83438 | Parker, ID | 38.5 mi |
Questions about 83423
What is the ZIP+4 code for 83423?
83423 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 83423, you need to look up a specific street address to get them.
What city is 83423?
83423 is assigned to Dubois, Idaho, in Clark 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.