The Mt. Lebanon School District is the public school system in Allegheny County for residents of Mt. Lebanon, Pennsylvania, a suburb of Pittsburgh, Pennsylvania. The district covers approximately 6.0 square miles, and serves a residential population of around 34,000 people.

Mt. Lebanon School District is organized into seven elementary schools for grades K–5 — Foster Elementary School, Hoover Elementary School, Howe Elementary School, Jefferson Elementary School, Lincoln Elementary School, Markham Elementary School, and Washington Elementary School. It also includes two middle schools, Jefferson Middle School and Andrew W. Mellon Middle School, serving grades 6–8, and Mt. Lebanon High School, which hosts grades 9–12.

The district is widely recognized for its strong academic programs, arts, athletics, and student support services. It regularly ranks among the top school districts in the Pittsburgh area and Pennsylvania overall, with high ratings for teaching quality, college readiness, and student achievement. Mt. Lebanon High School is consistently placed among the top high schools in the state and nation in major rankings.

The district borders six other school districts: Baldwin-Whitehall, Bethel Park, Chartiers Valley, Keystone Oaks, Pittsburgh Public Schools, and Upper St. Clair.