Private Schools in Diablo, California

Carondelet High School is a premier all-girls Catholic college preparatory school serving the Diablo Valley region. Established in 1965, the school offers a rigorous academic program with 22 Advanced Placement courses and comprehensive STEM initiatives. The 30-acre campus features state-of-the-art science labs, performing arts centers, and athletic facilities. With a student-teacher ratio of 14:1, Carondelet emphasizes leadership development and community service while maintaining strong college placement records. The school's partnership with De La Salle High School provides coeducational opportunities while preserving the benefits of single-gender education.

The Athenian School is a distinguished independent day and boarding school located in the foothills of Mount Diablo. Founded in 1965, Athenian offers the International Baccalaureate Diploma Program alongside innovative programs like the Athenian Wilderness Experience and robotics competitions. The 75-acre campus features modern academic buildings, science centers, and extensive athletic facilities. Known for its progressive educational philosophy, the school emphasizes critical thinking, global citizenship, and hands-on learning. Athenian serves students from Diablo and surrounding communities with a commitment to diversity and academic excellence.

Bentley School is a highly-regarded independent K-12 school serving the Diablo Valley area since 1975. With two campuses, the Lafayette campus serves middle and high school students with a comprehensive college preparatory curriculum featuring 18 Advanced Placement courses. The school emphasizes personalized education with small class sizes and dedicated faculty mentorship. Facilities include modern science laboratories, performing arts spaces, and competitive athletic venues. Bentley's robust extracurricular program includes championship athletics, visual and performing arts, and community service initiatives, preparing students for top-tier college placements and lifelong success.