Top 10 Boarding Schools In San Antonio And Fees (2025)

San Antonio, Texas, is a city rich in history, culture, and educational excellence. Beyond its famous landmarks like the Alamo and River Walk, San Antonio also boasts a selection of top-tier boarding schools offering exceptional academics, extracurricular programs, and holistic student development. Whether you’re seeking a college-preparatory curriculum, a military-focused education, or a faith-based environment, this guide covers the top boarding schools in San Antonio and their fees to help parents make an informed choice.

Top Boarding Schools In San Antonio And Fees

1. TMI Episcopal

Location: 20955 W Tejas Trail, San Antonio, TX
Estimated Annual Tuition: $48,000 (boarding) | $25,000 (day)

TMI Episcopal, formerly known as Texas Military Institute, is one of the oldest and most respected private schools in Texas. Founded in 1893, this coeducational school blends strong academics with leadership and character development. The school offers a college-preparatory curriculum with AP and honors courses, as well as electives in arts, engineering, and global studies.

Boarding students enjoy a close-knit community with modern dorms, dedicated residential staff, and leadership opportunities through the school’s JROTC program. Athletics and arts are also emphasized, offering students a balanced education that promotes physical fitness and creativity.

TMI Episcopal’s mission is to develop servant leaders who exhibit wisdom, integrity, service, excellence, and reverence — core values reflected in every aspect of student life. Graduates often matriculate to top universities such as the University of Texas, Rice, and Stanford.

2. The Winston School San Antonio

Location: 8565 Ewing Halsell Dr, San Antonio, TX
Estimated Annual Tuition: $40,000–$45,000

The Winston School San Antonio is known for its commitment to helping students with learning differences reach their highest potential. The school offers a nurturing environment tailored to the needs of students with dyslexia, ADHD, and other learning challenges.

Its small class sizes, individualized learning plans, and specialized faculty help students thrive academically and emotionally. While it primarily operates as a day school, it partners with nearby boarding facilities for out-of-town students who wish to stay on campus during the week.

Winston emphasizes the importance of building self-confidence and lifelong learning habits. With a curriculum that blends academics, arts, and social development, it’s a top choice for families seeking a supportive boarding environment in San Antonio.

3. San Antonio Academy

Location: 117 E French Pl, San Antonio, TX
Estimated Annual Tuition: $39,000 (boarding partner program)

Founded in 1886, San Antonio Academy is a prestigious all-boys preparatory school offering grades Pre-K through 8. Though it primarily operates as a day school, it provides boarding partnerships for international or distant families.

The academy is grounded in the values of honor, scholarship, leadership, and integrity. Its rigorous academic program, combined with athletics and arts, ensures a well-rounded education. Students also participate in leadership activities and outdoor education programs designed to build teamwork and responsibility.

Parents praise the school’s nurturing environment and its commitment to character formation. San Antonio Academy graduates typically move on to elite high schools and boarding schools across the U.S., laying the foundation for future success.

4. Keystone School

Location: 119 E Craig Pl, San Antonio, TX
Estimated Annual Tuition: $45,000 (boarding partnerships available)

Keystone School is an academically rigorous college-preparatory institution that consistently ranks among the top private schools in Texas. Founded in 1948, Keystone serves students from kindergarten through grade 12 and is known for its accelerated academic programs.

Although it does not operate its own dormitories, it collaborates with host families and boarding partners for out-of-town students. The school’s academic excellence is reflected in its 100% college acceptance rate, with graduates attending top universities nationwide.

Beyond academics, Keystone offers a wide array of extracurriculars, including debate, robotics, performing arts, and STEM competitions. Students are encouraged to pursue independent study and research, fostering intellectual curiosity and innovation.

5. Antonian College Preparatory High School

Location: 6425 West Ave, San Antonio, TX
Estimated Annual Tuition: $37,000 (boarding arrangement via local host program)

Antonian College Preparatory High School is a Catholic coeducational school that prepares students for higher education and a life of faith and service. The curriculum blends rigorous academics with community involvement and spiritual development.

Antonian’s partnership with host families and local boarding programs makes it a great option for out-of-town students seeking a San Antonio education. The school offers honors, AP, and dual-credit courses, with a focus on leadership, character, and excellence.

Students benefit from a strong athletics department, visual and performing arts programs, and a wide range of student organizations. Its values-driven approach ensures students develop academically and morally, ready for success in college and beyond.

6. Saint Mary’s Hall

Location: 9401 Starcrest Dr, San Antonio, TX
Estimated Annual Tuition: $50,000 (boarding partnership)

Saint Mary’s Hall is one of San Antonio’s most prestigious college-preparatory schools, offering a rich blend of academics, arts, and athletics. Founded in 1879, this coeducational school emphasizes intellectual curiosity, integrity, and resilience.

Its boarding partnership program accommodates students from other regions and countries who wish to study in San Antonio. The curriculum includes AP and honors courses, fine arts, world languages, and advanced STEM subjects.

Saint Mary’s Hall boasts a low student-to-teacher ratio, enabling personalized instruction and mentorship. The school’s graduates often gain admission to Ivy League and other top universities, making it one of the best academic investments in the city.

7. Central Catholic High School

Location: 1403 N St Mary’s St, San Antonio, TX
Estimated Annual Tuition: $35,000–$38,000 (boarding partner option)

Central Catholic High School, founded in 1852, is a historic all-boys school known for its emphasis on leadership, faith, and academic excellence. It offers a well-balanced education with strong programs in science, math, and the humanities.

The school’s partnership with local boarding accommodations allows students from outside San Antonio to enroll. Central Catholic’s mission focuses on developing morally responsible young men who are prepared for college and life.

With a robust athletic tradition, modern facilities, and a strong sense of brotherhood, the school offers a unique community atmosphere. Students benefit from service-learning projects and leadership initiatives that instill compassion and discipline.

8. Lutheran High School of San Antonio

Location: 18104 Babcock Rd, San Antonio, TX
Estimated Annual Tuition: $34,000 (boarding partner program)

Lutheran High School of San Antonio provides a Christ-centered education emphasizing faith, service, and academic achievement. It offers a college-prep curriculum supported by AP courses, extracurricular clubs, and athletic programs.

The school’s small class sizes foster close relationships between students and teachers, ensuring personalized attention. International and out-of-town students can participate in the boarding partnership program, which provides host family arrangements.

Lutheran High emphasizes leadership, integrity, and lifelong learning. Its graduates often move on to respected universities across the U.S., and its values-based approach prepares students for both academic and spiritual growth.

9. Cornerstone Christian Schools

Location: 17702 NW Military Hwy, San Antonio, TX
Estimated Annual Tuition: $40,000 (boarding program through partnerships)

Cornerstone Christian Schools is a leading faith-based institution that integrates rigorous academics with Christian values and leadership training. It offers programs from elementary through high school, making it a comprehensive choice for families seeking long-term education.

Its strong focus on athletics, arts, and technology enhances student engagement, while small class sizes ensure individualized support. Cornerstone also welcomes international students through its boarding partnership program, offering a home-like environment near campus.

Students are taught to pursue excellence, integrity, and service to others. The school’s high university acceptance rate and nurturing community make it one of San Antonio’s top Christian boarding options.

10. San Marcos Academy (near San Antonio)

Location: 2801 Ranch Rd 12, San Marcos, TX
Estimated Annual Tuition: $46,000–$52,000 (boarding)

Located just an hour from San Antonio, San Marcos Academy offers a traditional boarding experience with strong academic and spiritual foundations. Founded in 1907, the school provides a college-prep curriculum combined with leadership training and extracurricular activities.

The academy’s campus features modern dorms, athletic facilities, and technology-equipped classrooms. Students benefit from small class sizes, personal mentoring, and opportunities in fine arts, athletics, and ROTC programs.

San Marcos Academy stands out for its Christian-based education and its commitment to producing disciplined, well-rounded individuals. Its proximity to San Antonio makes it a convenient option for families seeking a true boarding school environment near the city.

Why Choose a Boarding School in San Antonio?

San Antonio’s boarding schools combine academic excellence with Texan hospitality and diversity. The city’s rich culture, safety, and opportunities for extracurricular engagement make it an ideal place for young learners. Boarding students gain independence, lifelong friendships, and a strong academic foundation — all while exploring one of Texas’s most dynamic urban centers.

Conclusion

Choosing the right boarding school in San Antonio depends on your child’s academic goals, personal interests, and values. Whether you prefer a faith-based institution like TMI Episcopal or an academically rigorous environment like Keystone School, San Antonio offers outstanding options for families seeking quality education.

These schools don’t just prepare students for college — they prepare them for life. With their balance of academics, leadership, and community engagement, they stand as some of the best boarding schools not only in San Antonio but in all of Texas.