Nantucket :"The Gray Lady". Nantucket: Also known as "The Gray Lady", Nantucket is located 26 nautical miles off the coast of Cape Cod, Massachusetts. Accessible only by air or sea, it is 16 miles long by 6 miles wide. Lined with miles of soft sandy beaches, the island is graced with charming cobblestone streets, and not a traffic signal to be found. Historically regarded as a premier vacation spot, Nantucket Island is the jewel of the Northeast!  The University of Nantucket store is proud to have been on Nantucket island for over 20 years! Please enjoy our Island responsibly and respect our beaches and wildlife.