ZIP Code 83811 — Clark Fork, ID
83811 is a standard (street delivery) ZIP code serving Clark Fork, Idaho, in Bonner 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 83811 at a glance
| ZIP code | 83811 |
|---|---|
| Primary city | Clark Fork |
| State | Idaho (ID) |
| County | Bonner FIPS 16017 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 1,997 |
| Coordinates | 48.112960, -116.155740 |
How ZIP+4 works in 83811
The four digits after the hyphen encode a delivery segment inside 83811. 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 83811 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 83811.
| ZIP | City | Distance |
|---|---|---|
| 59844 | Heron, MT | 11.2 mi |
| 83836 | Hope, ID | 11.7 mi |
| 83803 | Bayview, ID | 12.8 mi |
| 59853 | Noxon, MT | 16.2 mi |
| 83860 | Sagle, ID | 18.1 mi |
| 83809 | Careywood, ID | 19.9 mi |
| 83840 | Kootenai, ID | 21.5 mi |
| 83813 | Cocolalla, ID | 22.2 mi |
| 83852 | Ponderay, ID | 22.3 mi |
| 83825 | Dover, ID | 22.8 mi |
| 83801 | Athol, ID | 24.9 mi |
| 83864 | Sandpoint, ID | 27.4 mi |
Questions about 83811
What is the ZIP+4 code for 83811?
83811 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 83811, you need to look up a specific street address to get them.
What city is 83811?
83811 is assigned to Clark Fork, Idaho, in Bonner 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.