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	04858	South Thomaston	Knox County	`207`
ME	04859	Spruce Head	Knox County	`207`
ME	04860	Tenants Harbor	Knox County	`207`
ME	04861	Thomaston	Knox County	`207`
ME	04862	Union	Knox County	`207`
ME	04863	Vinalhaven	Knox County	`207`
ME	04864	Warren	Knox County	`207`
ME	04865	West Rockport	Knox County	`207`
ME	04901	Waterville	Kennebec County	`207`
ME	04903	Waterville	Kennebec County	`207`

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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.