Shikellamy High School is a public high school located in Sunbury, Pennsylvania, United States. The building was built in 1929. It is part of the Shikellamy School District. It is the sole public high school for the communities of Northumberland, Point Township, Rockefeller Township, Snydertown Borough, the City of Sunbury, and Upper Augusta Township. It was a combined middle/high school between 2011 and 2016, but there is now Shikellamy Middle School for grades 6 through 8 in Northumberland.