| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Newport | 1 | 24,078 | 25,103 | -0.71% | 3,145 | 8 | City |
| Portsmouth | 2 | 17,566 | 17,837 | 0.53% | 763 | 23 | Town |
| Middletown | 3 | 16,405 | 17,059 | -0.59% | 1,292 | 13 | Town |
| Tiverton | 4 | 15,690 | 16,335 | -0.75% | 540 | 29 | Town |
| Jamestown | 5 | 5,474 | 5,551 | -0.11% | 579 | 9 | Town |
| Little Compton | 6 | 3,520 | 3,613 | -0.42% | 171 | 21 | Town |
Newport is the largest city in Newport County, with a population of 24,078.
Little Compton is the smallest city in Newport County, with a population of 3,520.
There are 6 cities in Newport County, Rhode Island.