7 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Oak Bluffs | 1 | 5,469 | 5,332 | 0.57% | 750 | 7 | Town |
| Edgartown | 2 | 5,412 | 5,171 | 0.78% | 202 | 27 | Town |
| Tisbury | 3 | 5,021 | 4,813 | 0.94% | 770 | 7 | Town |
| West Tisbury | 4 | 3,725 | 3,545 | 1.2% | 149 | 25 | Town |
| Chilmark | 5 | 1,273 | 1,214 | 0.95% | 67 | 19 | Town |
| Aquinnah | 6 | 461 | 443 | 1.1% | 86 | 5 | Town |
| Gosnold | 7 | 64 | 62 | 1.59% | 5 | 13 | Town |
Oak Bluffs is the largest city in Dukes County, with a population of 5,469.
Gosnold is the smallest city in Dukes County, with a population of 64.
There are 7 cities in Dukes County, Massachusetts.