Westfield-Barnes Regional Airport is a joint civil-military airport in Hampden County, Massachusetts, three miles north of Westfield and northwest of Springfield. It was formerly Barnes Municipal Airport; the National Plan of Integrated Airport Systems for 2011–2015 categorized it as a general aviation facility. Westfield-Barnes is one of Massachusetts' largest airports with a strong flight training, general aviation, and military presence. It is also known as Barnes Air National Guard Base.