MASD may refer to:
Pennsylvania Mahanoy Area School District, Schuylkill County McKeesport Area School District, McKeesport Meyersdale Area School District, Somerset County Mifflinburg Area School District, Union County Millersburg Area School District, Dauphin County Millville Area School District, Columbia County Milton Area School District, Milton Minersville Area School District, Schuylkill County Mohawk Area School District, Bessemer, Lawrence County Moon Area School District, located about northwest of Pittsburgh Montgomery Area School District, Lycoming County Montoursville Area School District, Lycoming County Montrose Area School District, Susquehanna County Washington State Mount Adams School District, Yakima County