Idaho Falls, ID ZIP Codes, Area Codes and Address Format

City guides  |  June 4, 2026  |  2 min read

Looking up ZIP codes or writing an address in Idaho Falls, Idaho? Below is a practical reference built from postal data for the city.

State

Idaho (ID)

County

Bonneville County

Standard ZIP codes

4

Time zone

Mountain

Idaho Falls ZIP codes

These are the standard delivery ZIP codes for Idaho Falls. The city has 7 ZIP codes in total when PO Box and unique codes are included.

• 83401
• 83402
• 83404
• 83406

Area codes in Idaho Falls

Idaho Falls phone numbers use 208 and 986. With more than one code in use, residents on the same street can have different area codes.

Sample Idaho Falls addresses

The street lines are invented; the city, state and ZIP codes are real. Use them for form testing, mockups and training materials, never for real orders.

How to write an address in Idaho Falls

• End the address with IDAHO FALLS, ID and the five-digit ZIP code.
• Put apartment or suite numbers at the end of the street line.
• Use USPS abbreviations such as ST, AVE and BLVD.
• Match the ZIP code to the street. Idaho Falls has 4 codes, so the city name alone is not enough.

More Idaho cities

Ahsahka, Arco, Caldwell, Arimo, Aberdeen, or see all Idaho cities.