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	46408	Gary	Lake County	`219`
IN	46409	Gary	Lake County	`219`
IN	46410	Merrillville	Lake County	`219`
IN	46411	Merrillville	Lake County	`219`
IN	46501	Argos	Marshall County	`574`
IN	46502	Atwood	Kosciusko County	`574`
IN	46504	Bourbon	Marshall County	`574`
IN	46506	Bremen	Marshall County	`574`
IN	46507	Bristol	Elkhart County	`269, 574`
IN	46508	Burket	Kosciusko County	`574`

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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.