| Conventional Long Name: | Dukes County |
| Subdivision: | County |
| Nation: | Province of New York |
| Coordinates: | 41.341°N -70.82°W |
| Year Start: | 1683 |
| Year End: | 1691 |
| Date Start: | November 1, |
| Membership Title1: | Crown colony |
| Membership1: | Province of New York |
| S1: | Dukes County, MassachusettsDukes County |
| Border S1: | no |
| S2: | Nantucket |
| Flag S2: | Flag of Nantucket, Massachusetts.svg |
| Border S2: | no |
| Today: |  United States |
Dukes County was a county of the Province of New York from 1683 to 1691. It was established on November 1, 1683, at the same time as Kings County, Queens County, and Dutchess County. It consisted of the Elizabeth Islands, Martha's Vineyard, and Nantucket Island, all east of Long Island. In 1691, the county was transferred to the newly formed Province of Massachusetts Bay, where it was divided into Dukes County and Nantucket in Massachusetts.
