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
Maps and coordinates
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 46733 Decatur Adams County 260, 419, 567
IN 46737 Fremont Steuben County 260, 419, 517, 567
IN 46738 Garrett DeKalb County 260
IN 46740 Geneva Adams County 260
IN 46741 Grabill Allen County 260
IN 46742 Hamilton Steuben County 260, 419, 567
IN 46743 Harlan Allen County 260, 419, 567
IN 46745 Hoagland Allen County 260
IN 46746 Howe LaGrange County 260, 269, 517
IN 46747 Hudson Steuben County 260
Page 34 of 100

Geographic Map of Indiana

Postal context

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.