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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New London County ZIP Codes

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

County State ZIP Code City Area Codes
New London County CT 06370 Oakdale 860, 959
New London County CT 06371 Old Lyme 860, 959
New London County CT 06372 Old Mystic 860
New London County CT 06375 Quaker Hill 860, 959
New London County CT 06376 South Lyme 860, 959
New London County CT 06378 Stonington 401, 860, 959
New London County CT 06379 Pawcatuck 401, 860, 959
New London County CT 06380 Taftville 860, 959
New London County CT 06382 Uncasville 860, 959
New London County CT 06383 Versailles 860
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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.