North Allegheny Senior High School

North Allegheny Senior High School (NASH) is a suburban high school in the North Allegheny School District and is located in Wexford, Pennsylvania, a northern suburb of Pittsburgh, Pennsylvania. The current building was built in 1974. The feeder school is North Allegheny Intermediate High School which provides grades 9th and 10th.

As of the 2023–24 school year, the school had an enrollment of 2,697 students and 187.3 classroom teachers (on an FTE basis) in grades 9–12, for a student–teacher ratio of 14.4:1. There were 270 students (10.0% of enrollment) eligible for free lunch and 13 (0.5% of students) eligible for reduced-cost lunch. In 2013, enrollment was 1,277 pupils in grades 11th and 12th, with 3% of pupils from a low income home. In 2013, North Allegheny Senior High School employed 98 teachers.

Former principal Lawrence Butterini was recognized by the Pennsylvania Association of Elementary and Secondary School Principals as the Pennsylvania High School Principal of the Year in 2006. Butterini was NASH principal and a figurehead of the school until his retirement following the 2009–2010 school year.

North Allegheny Senior High school students may choose to attend A W Beattie Career Center for training in the trades. The Allegheny Intermediate Unit IU3 provides the school with a wide variety of services like specialized education for disabled students and hearing, speech and visual disability services and professional development for staff and faculty.