9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Newport | 1 | 24,324 | 25,114 | -0.65% | 3,177 | 8 | City |
| Portsmouth | 2 | 17,303 | 17,839 | -0.51% | 751 | 23 | Town |
| Middletown | 3 | 16,610 | 17,056 | 0% | 1,308 | 13 | Town |
| Tiverton | 4 | 15,818 | 16,336 | -0.75% | 544 | 29 | Town |
| Newport East | 5 | 11,613 | 11,289 | -0.09% | 2,019 | 6 | CDP |
| Tiverton | 6 | 8,237 | 7,996 | 0.55% | 1,971 | 4 | CDP |
| Jamestown | 7 | 5,487 | 5,552 | -0.13% | 581 | 9 | Town |
| Little Compton | 8 | 3,542 | 3,614 | -0.31% | 172 | 21 | Town |
| Melville | 9 | 2,068 | 1,877 | 2.48% | 986 | 2 | CDP |
Newport is the largest city in Newport County, with a population of 24,324.
Melville is the smallest city in Newport County, with a population of 2,068.
There are 9 cities in Newport County, Rhode Island.