ZIP Code 83871 — Troy, ID
83871 is a standard (street delivery) ZIP code serving Troy, 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 83871 at a glance
| ZIP code | 83871 |
|---|---|
| Primary city | Troy |
| State | Idaho (ID) |
| County | Latah FIPS 16057 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 2,240 |
| Coordinates | 46.745890, -116.738650 |
How ZIP+4 works in 83871
The four digits after the hyphen encode a delivery segment inside 83871. 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 83871 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 83871.
| ZIP | City | Distance |
|---|---|---|
| 83843 | Moscow, ID | 9.7 mi |
| 83857 | Princeton, ID | 10.3 mi |
| 83823 | Deary, ID | 11.2 mi |
| 83537 | Kendrick, ID | 13 mi |
| 83844 | Moscow, ID | 13.3 mi |
| 83872 | Viola, ID | 13.5 mi |
| 83535 | Juliaetta, ID | 14.2 mi |
| 83832 | Genesee, ID | 15.5 mi |
| 83834 | Harvard, ID | 16.1 mi |
| 83855 | Potlatch, ID | 17.9 mi |
| 83806 | Bovill, ID | 19.8 mi |
| 83541 | Lenore, ID | 20.7 mi |
Questions about 83871
What is the ZIP+4 code for 83871?
83871 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 83871, you need to look up a specific street address to get them.
What city is 83871?
83871 is assigned to Troy, 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.