ZIP Code 83221 — Blackfoot, ID
83221 is a standard (street delivery) ZIP code serving Blackfoot, Idaho, in Bingham 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 83221 at a glance
| ZIP code | 83221 |
|---|---|
| Primary city | Blackfoot |
| State | Idaho (ID) |
| County | Bingham FIPS 16011 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Boise |
| Population | 29,081 |
| Coordinates | 43.308740, -112.532170 |
How ZIP+4 works in 83221
The four digits after the hyphen encode a delivery segment inside 83221. 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 83221 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 83221.
| ZIP | City | Distance |
|---|---|---|
| 83262 | Pingree, ID | 14.5 mi |
| 83215 | Atomic City, ID | 16.9 mi |
| 83277 | Springfield, ID | 17.8 mi |
| 83218 | Basalt, ID | 18.5 mi |
| 83203 | Fort Hall, ID | 20.2 mi |
| 83274 | Shelley, ID | 21.9 mi |
| 83402 | Idaho Falls, ID | 23.8 mi |
| 83202 | Pocatello, ID | 25.1 mi |
| 83210 | Aberdeen, ID | 25.8 mi |
| 83404 | Idaho Falls, ID | 27.3 mi |
| 83236 | Firth, ID | 29.8 mi |
| 83201 | Pocatello, ID | 29.9 mi |
Questions about 83221
What is the ZIP+4 code for 83221?
83221 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 83221, you need to look up a specific street address to get them.
What city is 83221?
83221 is assigned to Blackfoot, Idaho, in Bingham 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.