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.

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Connecticut ZIP Codes

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

State ZIP Code City County Area Codes
CT 06762 Middlebury New Haven County 203, 475, 860, 959
CT 06763 Morris Litchfield County 203, 475, 860, 959
CT 06770 Naugatuck New Haven County 203, 475
CT 06776 New Milford Litchfield County 203, 475, 860, 959
CT 06777 New Preston Marble Dale Litchfield County 860, 959
CT 06778 Northfield Litchfield County 860, 959
CT 06779 Oakville Litchfield County 203, 475, 860, 959
CT 06781 Pequabuck Litchfield County 860, 959
CT 06782 Plymouth Litchfield County 203, 475, 860, 959
CT 06783 Roxbury Litchfield County 203, 475, 860, 959
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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.