There are 20 zip codes in Washington County, Rhode Island. The most populated is 2852, located in North Kingstown. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
0285223,382North Kingstown
0287922,369Wakefield
0289122,026Westerly
0288213,238Narragansett
028137,998Charlestown
028817,177Kingston
028746,376Saunderstown
028226,241Exeter
028925,920West Kingston
028324,887Hope Valley
028042,560Ashaway
028082,328Bradford
028981,857Wyoming
028121,038Carolina
02807962Block Island
02833670Hopkinton
02894609Wood River Junction
02875176Shannock
0287397Rockville
0283687Kenyon

Zip Codes in Washington County, Rhode Island by Population (2024)