Massachusetts Port Authority (Massport) is a port authority in the Commonwealth of Massachusetts. It owns and operates three airports—Boston Logan International Airport, Hanscom Field, and Worcester Regional Airport—and public terminals in the Port of Boston. It is a financially self-sustaining public authority whose transportation facilities generate more than $600 million annually; no state tax dollars are used to fund operations or capital improvements at Massport facilities. Its headquarters is located in the Logan Office Center, adjacent to Logan Airport in East Boston, Massachusetts.