Agawam is a city in Hampden County, Massachusetts, United States. The population was 28,438 at the 2010 census. Agawam sits on the western side of the Connecticut River, directly across from Springfield, Massachusetts. It is considered part of the Springfield Metropolitan Statistical Area, which is contiguous with the Knowledge Corridor area, the 2nd largest metropolitan area in New England. Agawam contains a subsection, Feeding Hills.The Six Flags New England amusement park is located in Agawam, on the banks of the Connecticut River. Agawam's ZIP code of 01001 is the lowest number in the continental United States.