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
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State directory

Maine ZIP Codes

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

State ZIP Code City County Area Codes
ME 04631 Eastport Washington County 207, 506
ME 04634 Franklin Hancock County 207
ME 04635 Frenchboro Hancock County 207
ME 04637 Grand Lake Stream Washington County 207
ME 04640 Hancock Hancock County 207
ME 04642 Harborside Hancock County 207
ME 04643 Harrington Washington County 207
ME 04644 Hulls Cove Hancock County 207
ME 04645 Isle Au Haut Knox County 207
ME 04646 Islesford Hancock County 207
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Geographic Map of Maine

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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.