Tyngsborough is a town located in the northwest section of Middlesex County, Massachusetts. Composed of 17.86 square miles (46.3 Square Kilometer) of land and surface water, Tyngsborough borders the towns of Dunstable, Groton, Westford, Chelmsford, Dracut, and the City of Lowell, as well as the New Hampshire communities of Hudson, Pelham, and the City of Nashua. Tyngsborough is 44 miles (71 km) from Boston along the recently widened Route 3 corridor. The town calls itself 'The Gateway to the White Mountains' of New Hampshire, which is the source of the Merrimack River that bisects the town. The town uses a Open Town Meeting model with a Board of Selectmen overseeing the operation of the town. Reporting to the Board of Selectmen is the Town Administrator, Michael P. Gilleberto, who oversees the public employees and day-to-day operations of the Town Offices. Other elected boards include: Planning Board, School Committee, Conservation Commission, Library Trustees, Cemetery Commission, Board of Health, Sewer Commission and the Zoning Board of Appeals.