Southwick is a town in Hampden County, Massachusetts, United States. The population was 9,232 at the 2020 census, down from 9,502 at the 2010 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area.
Southwick was originally inhabited by either the Matitacooke, Mayawaug, or Woronoake Native American tribes.
In the mid-17th century, pioneering English explorers moving up the Connecticut River Valley in search of fertile farmlands and game discovered the area and settled Southwick. It became a farming community, defined as the Southern (South-) village (-wick) part of the town of Westfield, Massachusetts. Early on, it was nicknamed "Poverty Plains" because the land was thought to be infertile. Its first residential home was built by Samuel Fowler and his wife Naomi Noble on what is now College Highway (US 202 and MA 10), about a quarter-mile north of the current town center.
In colonial times, church attendance was