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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Washington County ZIP Codes

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

County State ZIP Code City Area Codes
Washington County RI 02832 Hope Valley 401
Washington County RI 02833 Hopkinton 401, 860, 959
Washington County RI 02836 Kenyon 401
Washington County RI 02852 North Kingstown 401
Washington County RI 02854 North Kingstown 401
Washington County RI 02873 Rockville 401, 860, 959
Washington County RI 02874 Saunderstown 401
Washington County RI 02875 Shannock 401
Washington County RI 02877 Slocum 401
Washington County RI 02879 Wakefield 401
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Geographic Map of Washington County

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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.