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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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LaPorte County ZIP Codes

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

County State ZIP Code City Area Codes
LaPorte County IN 46340 Hanna 219, 574
LaPorte County IN 46345 Kingsbury 219
LaPorte County IN 46346 Kingsford Heights 219
LaPorte County IN 46348 La Crosse 219, 574
LaPorte County IN 46350 La Porte 219, 269
LaPorte County IN 46360 Michigan City 219, 269
LaPorte County IN 46365 Mill Creek 219, 574
LaPorte County IN 46371 Rolling Prairie 219, 574
LaPorte County IN 46382 Union Mills 219, 574
LaPorte County IN 46390 Wanatah 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.