Brookfield is a town in Worcester County, Massachusetts, United States. The population was 3,390 at the 2010 census.
Brookfield was first settled in 1660 and was officially incorporated in 1718. The town was settled by men from Ipswich as part of the Quaboag Plantation lands, though the settlers would be temporarily removed from the lands by attacks during King Philip's War.
During the winter of 1776, General Henry Knox passed through the town with cannon from Fort Ticonderoga to end the Siege of Boston. A marker along Route 9 commemorates his route.