Marion is a part of the South Coast region of Massachusetts which encompasses the communities that surround Buzzards Bay (excluding the Elizabeth Islands, Bourne and Falmouth), Mount Hope Bay and the Sakonnet River.

[citation needed] This caused the villagers to form a committee, which went to Boston to petition for incorporation as its own town.

[1] Since that time, Marion's economy has mostly relied on the waters of Buzzards Bay, both for fishing and for the summer tourism industry.

[6] The town is bordered by Mattapoisett to the southwest, Rochester to the northwest, and Wareham to the north and northeast.

Marion is a typical old New England town that has a small quaint village with many traditional Cape Cod style homes.

The town of Marion, Massachusetts is a part of the South Coast of Massachusetts, has a Humid continental climate, bordering on either an Oceanic climate, or Subtropical climate, typical of its location, Which is characterized by warm, humid summers, and cold to freezing winters, according to NOAA Weather Radio, with temperatures regularly dropping below freezing throughout the season.

The maritime influence helps regulate the temperatures somewhat, leading to milder winters, and cooler summers, as the town of Marion is bordering on Buzzards Bay.

The town is represented in the Massachusetts Senate as a part of the First Plymouth and Bristol district, which also includes Berkley, Bridgewater, Carver, Dighton, Middleborough, Raynham, Taunton, and Wareham.

On the national level, Marion is a part of Massachusetts's 9th congressional district, and is currently represented by William R. Keating.

Marion uses the open town meeting form of government, which is led by a board of selectmen.

Both regional schools are located on Route 6 in Mattapoisett, just over the Marion town line.

The town's Thanksgiving Day football rival is Apponequet Regional High School, in Lakeville.

As a small New England town the major infrastructures are the roads, water, and the waste disposal.

Marion also has a fine harbor facility with a wide concrete vehicle accessible jetty.

Marion is home to one of the largest sailing fleets in Massachusetts showing a forest of masts in the inner harbor.

Directly adjacent to the Harbormaster is a small shellfish area which is stocked by the town.

Until 2022,[20][21] Marion was home to Lockheed Martin Sippican, which developed technology for undersea warfare (e.g. drones,[22] torpedoes,[23] antennae[24]).

The company was founded in 1940 as Francis Associates, went public as Sippican Ocean Systems, Inc. in 1981, and was acquired by Lockheed Martin in 2004.