ZIP Code 83857 — Princeton, ID
83857 is a standard (street delivery) ZIP code serving Princeton, Idaho, in Latah 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 83857 at a glance
| ZIP code | 83857 |
|---|---|
| Primary city | Princeton |
| State | Idaho (ID) |
| County | Latah FIPS 16057 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 1,074 |
| Coordinates | 46.889500, -116.797760 |
How ZIP+4 works in 83857
The four digits after the hyphen encode a delivery segment inside 83857. 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 83857 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 83857.
| ZIP | City | Distance |
|---|---|---|
| 83834 | Harvard, ID | 8.3 mi |
| 83855 | Potlatch, ID | 8.3 mi |
| 83872 | Viola, ID | 8.5 mi |
| 83871 | Troy, ID | 10.3 mi |
| 83843 | Moscow, ID | 13.4 mi |
| 83823 | Deary, ID | 14.4 mi |
| 83844 | Moscow, ID | 15.3 mi |
| 99161 | Palouse, WA | 15.8 mi |
| 83824 | Desmet, ID | 16.4 mi |
| 83870 | Tensed, ID | 17.4 mi |
| 99130 | Garfield, WA | 19.8 mi |
| 99128 | Farmington, WA | 19.9 mi |
Questions about 83857
What is the ZIP+4 code for 83857?
83857 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 83857, you need to look up a specific street address to get them.
What city is 83857?
83857 is assigned to Princeton, Idaho, in Latah 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.