Peddocks Island is one of the largest islands in Boston Harbor. Since 1996 it has formed part of the Boston Harbor Islands National Recreation Area. Managed by the Department of Conservation and Recreation, the island is home to the now-defunct Fort Andrews, active in harbor defense from 1904 to the end of World War II, on its eastern end, and a group of privately owned cottages on its western end.Campsites are also on the eastern end. Ferry service between Peddocks Island and Georges Island (where Fort Warren stands) is provided on a seasonal basis.
Peddocks Island lies across Hull Gut from the Pemberton neighborhood of Hull to the north and across West Gut to Nut Island & Houghs Neck to the west. The island is located at 42° 17' 32.6" North latitude and 70° 56' 21.6" West longitude. The area of the island is 210.4 acres (0.851 km2), its total acreage at low tide is 288, and its highest elevation is 80 feet. Boasting the longest island shoreline in Boston Harbor, Peddocks Island comprises four headlands connected by gravel or sand bars known as tombolos.