ZIP Code 84320 — Lewiston, UT
84320 is a standard (street delivery) ZIP code serving Lewiston, Utah, in Cache 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 84320 at a glance
| ZIP code | 84320 |
|---|---|
| Primary city | Lewiston |
| State | Utah (UT) |
| County | Cache FIPS 49005 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 3,162 |
| Coordinates | 41.960110, -111.852520 |
How ZIP+4 works in 84320
The four digits after the hyphen encode a delivery segment inside 84320. 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 84320 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 84320.
| ZIP | City | Distance |
|---|---|---|
| 84333 | Richmond, UT | 4.4 mi |
| 84338 | Trenton, UT | 5.4 mi |
| 84308 | Cornish, UT | 5.9 mi |
| 83237 | Franklin, ID | 6.1 mi |
| 84335 | Smithfield, UT | 9.2 mi |
| 84327 | Newton, UT | 9.8 mi |
| 83286 | Weston, ID | 10.5 mi |
| 84305 | Clarkston, UT | 10.6 mi |
| 84318 | Hyde Park, UT | 11.2 mi |
| 84304 | Cache Junction, UT | 11.8 mi |
| 84341 | Logan, UT | 13.2 mi |
| 83232 | Dayton, ID | 13.4 mi |
Questions about 84320
What is the ZIP+4 code for 84320?
84320 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 84320, you need to look up a specific street address to get them.
What city is 84320?
84320 is assigned to Lewiston, Utah, in Cache 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.