U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records
All states and U.S. territories
Maps and coordinates
State directory

Idaho ZIP Codes

Complete postal directory, details, and geographic map for the State of Idaho.

State ZIP Code City County Area Codes
ID 83405 Idaho Falls Bonneville County 208
ID 83406 Idaho Falls Bonneville County 208, 986
ID 83415 Idaho Falls Bonneville County 208
ID 83420 Ashton Fremont County 208, 307, 986
ID 83421 Chester Fremont County 208, 986
ID 83422 Driggs Teton County 208, 307, 986
ID 83423 Dubois Clark County 208, 406, 986
ID 83424 Felt Teton County 208, 986
ID 83425 Hamer Jefferson County 208, 986
ID 83427 Iona Bonneville County 208, 986
Page 11 of 33

Geographic Map of Idaho

Postal context

About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.