Idaho Zip Codes

Idaho has a total of 300 ZIP codes, covering its mix of urban hubs and expansive rural areas. These ZIP codes begin with the digits 83, uniquely designating Idaho within the U.S. postal system. The range starts at 83201 in Pocatello and extends to 83877 in Rathdrum, reflecting the state’s geographic diversity.

The 83 prefix is consistent across Idaho, with lower numbers serving the southeastern and central regions, such as Pocatello, Idaho Falls, and Boise. Higher numbers are used in northern areas, including Coeur d’Alene and other communities closer to the Washington and Montana borders. ZIP codes are more densely concentrated around urban centers and sparsely distributed across Idaho’s rural and mountainous areas.

These codes are essential for mail delivery, geographic identification, and administrative purposes, such as defining school district boundaries or zoning regulations. They also play a role in business operations, helping companies organize logistics and demographic analyses.