Lower Dauphin High School is a midsized, suburban, public high school located in Hummelstown, Pennsylvania. It is part of the Lower Dauphin School District, serving Hummelstown, East Hanover, South Hanover, Londonderry Township, and Conewago Township. In 2017–2018, enrollment was reported as 1,165 pupils in 9th through 12th grades. The school building was built in 1960.