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
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State directory

Indiana ZIP Codes

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

State ZIP Code City County Area Codes
IN 46361 Michigan City La Porte County 219
IN 46365 Mill Creek LaPorte County 219, 574
IN 46366 North Judson Starke County 219, 574
IN 46368 Portage Porter County 219
IN 46371 Rolling Prairie LaPorte County 219, 574
IN 46372 Roselawn Newton County 219
IN 46373 Saint John Lake County 219
IN 46374 San Pierre Starke County 219, 574
IN 46375 Schererville Lake County 219
IN 46376 Schneider Lake County 219
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Geographic Map of Indiana

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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.