ZIP Code 83323 — Declo, ID
83323 is a standard (street delivery) ZIP code serving Declo, Idaho, in Cassia 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 83323 at a glance
| ZIP code | 83323 |
|---|---|
| Primary city | Declo |
| State | Idaho (ID) |
| County | Cassia FIPS 16031 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Boise |
| Population | 1,984 |
| Coordinates | 42.469020, -113.408100 |
How ZIP+4 works in 83323
The four digits after the hyphen encode a delivery segment inside 83323. 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 83323 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 83323.
| ZIP | City | Distance |
|---|---|---|
| 83311 | Albion, ID | 8.9 mi |
| 83350 | Rupert, ID | 19.2 mi |
| 83318 | Burley, ID | 21.1 mi |
| 83336 | Heyburn, ID | 21.8 mi |
| 83211 | American Falls, ID | 22.1 mi |
| 83342 | Malta, ID | 23.8 mi |
| 83312 | Almo, ID | 27.7 mi |
| 83271 | Rockland, ID | 28.6 mi |
| 83347 | Paul, ID | 30.2 mi |
| 83346 | Oakley, ID | 31.6 mi |
Questions about 83323
What is the ZIP+4 code for 83323?
83323 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 83323, you need to look up a specific street address to get them.
What city is 83323?
83323 is assigned to Declo, Idaho, in Cassia 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.