Nantucket /ˌnænˈtʌkɨt/ is an island 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 coterminous Nantucket County, which are consolidated. As of the 2010 census, the population was 10,172, making it the least-populous county in Massachusetts. Part of the town is designated the Nantucket CDP, or census-designated place.