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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.

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Clark County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Clark County.

County State ZIP Code City Area Codes
Clark County ID 83423 Dubois 208, 406, 986
Clark County ID 83446 Spencer 208, 986
Clark County IL 62420 Casey 217, 447, 618
Clark County IL 62423 Dennison 217, 447, 812, 930
Clark County IL 62441 Marshall 217, 447, 812, 930
Clark County IL 62442 Martinsville 217, 447, 618
Clark County IL 62474 Westfield 217, 447
Clark County IL 62477 West Union 217, 447, 618, 812, 930
Clark County IN 47104 Bethlehem 502, 812, 930
Clark County IN 47106 Borden 812, 930
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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.