Marina Bay is a waterfront community in Squantum. It offers a variety of residential and commercial options, as well as recreational and cultural amenities. Marina Bay is home to the largest marina in New England, with over 700 slips and a full-service boatyard. Marina Bay also features a boardwalk with restaurants, shops, and entertainment venues, as well as a public park with a fishing pier and a memorial to the Naval Air Station Squantum.

Marina Bay is adjacent to Squantum Point Park. 

Squantum is a neighborhood of Quincy connected to the mainland by a causeway that crosses over a wetland area of the bay. Often thought of as a peninsula, Squantum proper is technically a barrier island as it is surrounded on all four sides by water and is only connected to the mainland and Moon Island via causeways. Located in the northernmost portion of the city, Squantum is bordered on the north by Dorchester Bay and Boston Harbor, on the east by Moon Island and Quincy Bay, on the south by Quincy Bay and North Quincy, and the west by the Marina Bay development.

Squantum has scenic, waterfront views of Boston Harbor and the Boston skyline. The neighborhood is further characterized by its tree-lined streets, its "island getaway" feel, its close-knit community, and its annual Squantum Fourth of July Parade.