Enfield was disincorporated on April 28, 1938 and portions of the town were annexed to the adjacent towns of Belchertown, New Salem, Pelham, and Ware. (Not all of the former town is now in Hampshire County: the portion ceded to New Salem is now in Franklin County.) The headquarters of the Metropolitan District Commission during the construction of the Quabbin Reservoir was located in the former town hall, and was the last building razed in the Swift River Valley, in 1940. The majority of the town center now lies submerged beneath the reservoir, although the Quabbin Observatory and Enfield Lookout, located on scenic Quabbin Hill, as well as the main entrance and headquarters of Quabbin State Park, a popular tourist destination with an emphasis on state history and nature, are all within the former town's limits.
Much of the novel Infinite Jest takes place in a city called Enfield, Mass., but geographic clues make clear that this is not a reference to the actual Enfield, and is instead a fictional stand-in for Brighton. The Enfield Tennis Academy and Ennet House, major locations in the novel, are located there.
Someday by Jackie French Koller is a children's book about the history of Enfield. It is about a girl who has to move from Enfield so they can flood the town to make a drinking water reservoir for Boston.