Twin Falls, ID ZIP Codes
Twin Falls, Idaho has 2 ZIP codes: for street addresses and for PO boxes.
Mail addressed to Twin Falls covers nearby places too.
Where the 83301 ZIP code reaches
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83303 has no area on the map: it is a PO box or single-organization ZIP code. Dashed line: Twin Falls city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
Check an address in Twin Falls
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Twin Falls PO box and business ZIP codes
| ZIP | Type and post office or station |
|---|---|
| 83301 | street delivery Pioneer Station |
| 83303 | PO boxes at the Twin Falls post office Twin Falls |
ZIP codes from nearby towns that reach into Twin Falls
- 83341, mailing town Kimberly, covers 3 percent of Twin Falls
Why your mail may say Twin Falls when you live outside it
Twin Falls ZIP codes also cover Hollister, so a letter addressed to Twin Falls can go to a home outside the city limits.
The reverse happens too: parts of Twin Falls use 83341, which mails under a neighboring town's name.
A ZIP code does not set your city, school district or tax. Twin Falls County property records show which city you are in.
Twin Falls ZIP code questions
What is the main ZIP code for Twin Falls?
83301, the ZIP code of the main Pioneer Station post office at 1376 Fillmore St.
Which Twin Falls ZIP codes are for PO boxes only?
83303. Mail to it goes to boxes at the post office, not to street addresses.
What county is Twin Falls in?
Twin Falls County.
ZIP codes for towns near Twin Falls
More towns near Twin Falls: Idaho Falls, Logan, Roy, Ogden, Syracuse, Rexburg, Clearfield, Layton, Kaysville.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections