ZIP Code 83243 — Holbrook, ID
83243 is a standard (street delivery) ZIP code serving Holbrook, Idaho, in Oneida 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 83243 at a glance
| ZIP code | 83243 |
|---|---|
| Primary city | Holbrook |
| State | Idaho (ID) |
| County | Oneida FIPS 16071 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Boise |
| Population | 49 |
| Coordinates | 42.244440, -112.672920 |
How ZIP+4 works in 83243
The four digits after the hyphen encode a delivery segment inside 83243. 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 83243 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 83243.
| ZIP | City | Distance |
|---|---|---|
| 83252 | Malad City, ID | 15.2 mi |
| 83271 | Rockland, ID | 17.1 mi |
| 83212 | Arbon, ID | 19.3 mi |
| 84336 | Snowville, UT | 26 mi |
| 84331 | Portage, UT | 26.2 mi |
| 83214 | Arimo, ID | 28.4 mi |
| 83342 | Malta, ID | 29.1 mi |
| 83234 | Downey, ID | 31.8 mi |
| 84316 | Howell, UT | 34.5 mi |
| 84330 | Plymouth, UT | 34.7 mi |
| 83211 | American Falls, ID | 35 mi |
| 83250 | Mccammon, ID | 37.9 mi |
Questions about 83243
What is the ZIP+4 code for 83243?
83243 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 83243, you need to look up a specific street address to get them.
What city is 83243?
83243 is assigned to Holbrook, Idaho, in Oneida 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.