A Legacy of Excellence Since 1980
St. Mary's Senior Girls School was founded in 1980 under the sponsorship of the Catholic Diocese of Isiolo. What began as a small community initiative has blossomed into one of the premier academic institutions in the region.
Over the past four decades, we have remained committed to our core mission of providing holistic education to young women, empowering them to become leaders of integrity and agents of positive change in society.
Our Vision
To be a center of excellence in providing holistic education for the empowerment of the girl child for service to humanity.
Our Mission
To provide quality education through faith formation, academic excellence, and integrated human development.
Our Core Values
Spirituality & Faith
Academic Integrity
Self-Discipline
Service to Others
School Leadership
"Our mission at St. Mary's is to nurture not just the mind, but the soul. We aim to produce holistic individuals who are ready to serve society with integrity and faith."
Rt. Rev. Peter Makau, IMC
Bishop of Isiolo & School Manager
Read Bishop's Full Message
"At St. Mary's, we believe that education is the most powerful weapon which you can use to change the world. Our dedicated staff works tirelessly to ensure that every girl who walks through our gates leaves with the knowledge, confidence, and faith to conquer any challenge."
Sr. Julia Mark
Principal, St. Mary's Isiolo
Key Faculty
Mr. John Kamau
Deputy Principal (Academics)
Mrs. Sarah Otieno
Head of Science Dept.
Mr. David Musembi
Director of Student Affairs