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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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Porter County ZIP Codes

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

County State ZIP Code City Area Codes
Porter County IN 46301 Beverly Shores 219
Porter County IN 46302 Boone Grove 219
Porter County IN 46304 Chesterton 219
Porter County IN 46341 Hebron 219
Porter County IN 46347 Kouts 219
Porter County IN 46368 Portage 219
Porter County IN 46383 Valparaiso 219
Porter County IN 46384 Valparaiso 219
Porter County IN 46385 Valparaiso 219
Porter County IN 46393 Wheeler 219

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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.