Seton LaSalle Catholic High School is a private, Roman Catholic high school in Mt. Lebanon, Pennsylv Lebanon, Pennsylvania, a suburb of Pittsburgh, Pennsylvania.
It is located in the Roman Catholic Diocese of Pittsburgh. Seton LaSalle has been ranked among the top 50 Catholic high schools in the U.S. The required courses at Seton LaSalle build upon state-mandated courses. Instruction is provided to students in three tracks: Honors, Academic, and General. Also, over 10 AP courses are offered. The grading system at Seton LaSalle is similar to some other high
06/23/2026
The city of Pittsburgh has officially declared today National Ryan Lestitian Day! We are so proud of Alum Ryan Lestitian '22, who is a first-time author following the publication of his work, Cell 900. You can read more about Ryan and his work here: https://www.ryanlestitian.com/
06/23/2026
Seton LaSalle is seeking a dedicated school maintenance/custodial worker to maintain a clean, safe, and fully functional learning environment and campus for our students, staff, and visitors, including the school building, grounds, and athletics fields/buildings. Interested applicants can click here to view more: https://www.slshs.org/apps/jobs/show_job.jsp?REC_ID=48771
06/17/2026
Congratulations to the following students who made the 4th quarter Honor Roll! At Seton LaSalle, we proudly offer 40 honors classes, 19 AP classes, two rigorous curriculum options (traditional and classical studies), and a tailored learning environment to help our students succeed. Learn more about the SLS Difference here: https://www.slshs.org/apps/pages/sls-difference
06/15/2026
Congratulations to Principal Will Merchant, this year’s recipient of the James L. Palmer Award! The Palmer family recently presented Mr. Merchant with this special honor in recognition of his unwavering dedication to Seton LaSalle, our faculty, and our students. His leadership, compassion, and commitment to our school community make a lasting impact each and every day. A heartfelt thank you to the Palmer family for joining us at our final faculty gathering of the year to present the award. Congratulations, Mr. Merchant!
06/10/2026
We are proud to celebrate Class of 1978 alumnus Stephen Flaherty on his Tony Award win for Best Revival of a Musical for Ragtime at the 2026 Tony Awards! Based on the acclaimed novel, Ragtime brings early 20th-century New York City to life through its powerful story and unforgettable score. The musical features music by our very own Stephen Flaherty, lyrics by Lynn Ahrens, and a book by Terrence McNally. Congratulations, Stephen, on this extraordinary achievement and for continuing to inspire the next generation of artists and storytellers. Read more: https://playbill.com/article/ragtime-wins-best-revival-of-a-musical-at-the-2026-tony-awards
06/10/2026
06/08/2026
Mrs. Maffei’s US history classes recently presented their “decades projects”! Each group had to thoroughly research a decade and create a presentation including the popular fashion, recipes, music, and more from that time.
06/05/2026
What an amazing year at Seton LaSalle! We wish all of our Rebels a safe and fun summer.
06/04/2026
Each month, Fr. John Kist, ‘15, meets with interested students during their lunch periods to discuss a theological topic beyond what is covered in the classroom, plus cookies are provided! This month, Fr. Kist met with students to talk about peace, anxiety and faith. This session broke open the Scriptures to allow students to dive in deeper to their faith and receive the gift of peace that Christ wants to give them.