ZIP Code 83666 — Placerville, ID
83666 is a standard (street delivery) ZIP code serving Placerville, Idaho, in Boise 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 83666 at a glance
| ZIP code | 83666 |
|---|---|
| Primary city | Placerville |
| State | Idaho (ID) |
| County | Boise FIPS 16015 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Boise |
| Population | 30 |
| Coordinates | 43.961570, -115.973980 |
How ZIP+4 works in 83666
The four digits after the hyphen encode a delivery segment inside 83666. 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 83666 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 83666.
| ZIP | City | Distance |
|---|---|---|
| 83629 | Horseshoe Bend, ID | 10.3 mi |
| 83622 | Garden Valley, ID | 10.8 mi |
| 83631 | Idaho City, ID | 11.2 mi |
| 83602 | Banks, ID | 12.8 mi |
| 83670 | Sweet, ID | 17.1 mi |
| 83714 | Garden City, ID | 22 mi |
| 83702 | Boise, ID | 22.4 mi |
| 83616 | Eagle, ID | 24.3 mi |
| 83703 | Boise, ID | 24.5 mi |
| 83712 | Boise, ID | 24.8 mi |
| 83657 | Ola, ID | 24.9 mi |
| 83716 | Boise, ID | 25.5 mi |
Questions about 83666
What is the ZIP+4 code for 83666?
83666 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 83666, you need to look up a specific street address to get them.
What city is 83666?
83666 is assigned to Placerville, Idaho, in Boise 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.