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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Hartford County ZIP Codes

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

County State ZIP Code City Area Codes
Hartford County CT 06023 East Berlin 860, 959
Hartford County CT 06025 East Glastonbury 860
Hartford County CT 06026 East Granby 860, 959
Hartford County CT 06027 East Hartland 413, 860, 959
Hartford County CT 06028 East Windsor Hill 860
Hartford County CT 06030 Farmington 860
Hartford County CT 06032 Farmington 860, 959
Hartford County CT 06033 Glastonbury 860, 959
Hartford County CT 06034 Farmington 860
Hartford County CT 06035 Granby 413, 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.