Private Schools in Custer, Montana

The Sage School offers a distinctive classical education model that serves families throughout southeastern Montana, including Custer. Founded in 2006, this independent school emphasizes the trivium of grammar, logic, and rhetoric through Socratic dialogue and rigorous academic standards. Students study Latin from elementary grades and engage with primary sources in humanities. The school maintains small class sizes with a student-teacher ratio of 8:1, ensuring personalized instruction. Their comprehensive curriculum includes integrated STEM education, character development, and extensive outdoor education programs that leverage Montana's natural environment.

Billings Central Catholic High School is a premier private Catholic school serving eastern Montana, including the Custer area. Established in 1956, this co-educational institution offers a rigorous college preparatory curriculum with a 100% college acceptance rate. The school features modern STEM labs, competitive athletics programs, and extensive fine arts opportunities. With small class sizes averaging 18 students, personalized attention and character formation are central to their educational approach. The campus includes state-of-the-art facilities including a newly renovated library, science laboratories, and athletic complexes.

Harvest Christian School has been serving Billings and surrounding communities including Custer since 1994. This Christian private school utilizes the Accelerated Christian Education (ACE) curriculum, providing individualized learning plans that allow students to progress at their own pace. The school features modern computer labs, comprehensive music programs, and competitive athletic teams. With a focus on character development and spiritual formation, Harvest Christian maintains small class sizes and offers extensive extracurricular activities including robotics, drama, and community service opportunities. The school serves students from preschool through high school.