According to the United States Census Bureau, the town has a total area of 26.3 square miles (68.1 km2), of which 22.2 square miles (57.5 km2) is land and 4.1 square miles (10.6 km2), or 15.58%, is water. Hingham is bordered on the east by Cohasset, and Scituate, on the south by Norwell and Rockland, on the west by Weymouth, and on the north by Hingham Bay and Hull. Cohasset and Weymouth are in Norfolk County; the other towns, like Hingham itself, are in Plymouth County. Hingham is 14 miles (23 km) southeast of downtown Boston. Hingham lies along the southwest corner of Boston Harbor, at the portion known as Hingham Bay. The bay leads to a harbor, which cuts a U-shaped indentation into the northern shore of the town. The town is separated from Hull by the Weir River and its tributary, which leads to the Straits Pond. The northern third of the town’s border with Weymouth consists of the Weymouth Back River, which empties out into Hingham Bay. There are several other small ponds and brooks throughout town. The town also has several forests and parks, the largest of which, Wompatuck State Park, spreads into the neighboring towns of Cohasset, Scituate and Norwell. There are also several conservation areas throughout town; the portion of the Boston Harbor Islands National Recreation Area in Hingham includes Bumpkin Island, Button Island, Langlee Island, Ragged Island, Sarah Island and the World’s End Reservation, which juts out into the bay. There is a marina along the mouth of the Weymouth Back River, and a public beach along the harbor.
Source: Wikipedia, https://en.wikipedia.org/wiki/Hingham,_Massachusetts