楠塔基特（Nantucket, Massachusetts）是美国麻萨诸塞州南部的一个岛屿，与塔克纳克岛 (Tuckernuck Island)和木斯基格岛（Muskeget Island）组成南塔克特镇（其范围与南塔克特县同，且为县治所在）。面积272.6平方公里。根据美国2000年人口普查，共有人口9520人。

成立于1695年6月22日 (1691年自纽约州划入麻萨诸塞州)。县名来自纳拉甘西特语（Narragansett）或万帕诺亚格语（Wampanoag），意思是「尖岬周围的潮水」。另一个意思是「遥远的岛屿」。

Nantucket /ˌnænˈtʌkᵻt/ is an island about 30 miles (50 km) south of Cape Cod, in the American state of Massachusetts. Together with the small islands of Tuckernuck and Muskeget, it constitutes the Town of Nantucket, and the conterminous Nantucket County, which are consolidated. As of the 2010 census, the population was 10,172, though many citizens believe the population has risen to about 20,000 including people out of the census. Part of the town is designated the Nantucket CDP, or census-designated place. The region of Surfside on Nantucket is the southernmost settlement in Massachusetts.