20 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 02852 | North Kingstown | 23,406 |
| 02879 | Wakefield | 21,802 |
| 02891 | Westerly | 21,587 |
| 02882 | Narragansett | 13,091 |
| 02813 | Charlestown | 8,051 |
| 02881 | Kingston | 7,687 |
| 02822 | Exeter | 6,539 |
| 02874 | Saunderstown | 6,379 |
| 02892 | West Kingston | 5,768 |
| 02832 | Hope Valley | 4,998 |
| 02808 | Bradford | 2,657 |
| 02804 | Ashaway | 2,609 |
| 02898 | Wyoming | 1,912 |
| 02812 | Carolina | 1,479 |
| 02894 | Wood River Junction | 831 |
| 02807 | Block Island | 777 |
| 02833 | Hopkinton | 499 |
| 02873 | Rockville | 124 |
| 02836 | Kenyon | 104 |
| 02875 | Shannock | 44 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 20 ZCTAs in Washington County, Rhode Island (US Census).