Conestoga High School, located in Tredyffrin Township, Pennsylvania, is the only upper secondary school in the Tredyffrin/Easttown School District. It has a Berwyn post office address, though it is not in the Berwyn census-designated place.
Conestoga, commonly referred to as "Stoga", is northwest of Philadelphia in the suburbs known as the Main Line.
Conestoga has eight academic departments: Business/Technology, English, World Languages, Mathematics, Science, Social Studies, Visual and Performing Arts, and Wellness/Fitness/Family & Consumer Science. Students must earn 24 credits in order to graduate. One credit is equivalent to a year-long class.
In 2016, Niche.com ranked the Tredyffrin Easttown school district first in the United States. In the 2016 edition of Newsweeks "America's Top High Schools", Conestoga High School was ranked 36th in the nation and the 1st in Pennsylvania.
The Conestoga Class of 2022 includes 39 National Merit Semi-finalists, the most in Pennsylvania. The Conestoga Class of 2018 includes 34 National Merit Semi-finalists, 26 National Merit Commended students, and 2 National Hispanic Scholars.
Conestoga is home to a student-produced news website, Spoke.news (formerly Stoganews.com). It is produced by the staff of The Spoke, Conestoga's student run newspaper. The Spoke has been the recipient of several national awards.
In 2017, Conestoga was the first high school to receive the Pennsylvania Governor's Civic Engagement Award for registering 85% of eligible students to vote. In 2018, the students who ran the drive brought the organization "New Voters" to the national level.
Conestoga competes in 17 different sporting events generally within the Central League.
In 2015, the Chester County District Attorney's office began investigating reports of sexting against several freshman football players at the school. The father of one of the accused alerted the District Attorney's office that his son was being bullied and hazed by Conestoga's football team. Tredyffrin Township Police investigated and found that the boy had been sodomized with a broomstick by his teammates, and multiple hazing rituals existed within the team, including "No Gay Thursdays," where players engaged in sexually provocative and explicit behavior with their teammates that might otherwise be considered homosexual behavior, otherwise. The victim of the forced sodomization was charged with a misdemeanor for the sexting, and three other players were charged, and pled guilty to, harassment.
In August 2025, the Philadelphia Inquirer reported on an alleged cover-up by school administration into a gambling ring organized by a long-time basketball coach, who was betting on the outcomes of the school's games.
In May 2025, Michelle Mercogliano, a special education teacher, was arrested and faces 63 charges relating to allegations that she had sex with a sixteen year old student more than twelve times at her home. She was also charged for allegedly purchasing marijuana for the student.