The Northern York County School District is a midsized, suburban public school district in York County, Pennsylvania. It includes the Boroughs of Dillsburg, Franklintown, and Wellsville; as well as the Townships of Carroll, Franklin, Monaghan, Warrington, and Washington. The school district has a population of 20,023, according to a 2005 local census. By 2010, the district's population had increased to 21,108 people. The educational attainment levels for the Northern York County School District population (25 years old and over) were 91.9% high school graduates and 29.8% college graduates.