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
285223,382North Kingstown
287922,369Wakefield
289122,026Westerly
288213,238Narragansett
28137,998Charlestown
28817,177Kingston
28746,376Saunderstown
28226,241Exeter
28925,920West Kingston
28324,887Hope Valley
28042,560Ashaway
28082,328Bradford
28981,857Wyoming
28121,038Carolina
2807962Block Island
2833670Hopkinton
2894609Wood River Junction
2875176Shannock
287397Rockville
283687Kenyon
showing: 20 rows

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