For the 2026 school year, there are 4 college-prep and junior boarding schools serving 1,619 students located throughout Missouri.
You can also browse our full boarding school directory or specify additional search criteria.
Top Missouri Boarding Schools (2026)
School
Location
Quick Facts
Chaminade College Preparatory School ![Chaminade College Preparatory School Photo - Chaminade is located 20 minutes outside of Downtown St. Louis in the lovely, safe, green neighborhood of Creve Coeur. Our 55 acre campus is fun and lively throughout the school year and a wonderful place not only to study and play but also to become part of the family.]( "Chaminade College Preparatory School Photo - Chaminade is located 20 minutes outside of Downtown St. Louis in the lovely, safe, green neighborhood of Creve Coeur. Our 55 acre campus is fun and lively throughout the school year and a wonderful place not only to study and play but also to become part of the family.")
(Catholic)
425 South Lindbergh Blvd.
St. Louis, MO 63131
(314) 692-6645
St. Louis, MO 63131
(314) 692-6645
Gr: 6-12 | 800 students Student-teacher ratio: 9:1 Avg. class size: 17 students Tuition listed
204 Grand Street
Mexico, MO 65265
(573) 581-1776
Mexico, MO 65265
(573) 581-1776
Gr: 7-12, PG | 220 students Student-teacher ratio: 11:1 Avg. class size: 14 students Acceptance rate: 65% Tuition listed
Principia School ![Principia School Photo - Principia's supportive community is one where all levels come together to cheer on our sports teams.]( "Principia School Photo - Principia's supportive community is one where all levels come together to cheer on our sports teams.")
(Christian)
13201 Clayton Rd
St. Louis, MO 63131
(314) 514-3188
St. Louis, MO 63131
(314) 514-3188
Gr: 8-12 | PK-12 (day) | 511 students Student-teacher ratio: 8:1 Avg. class size: 15 students Acceptance rate: 62% Tuition listed
4100 South Lindbergh Blvd.
Saint Louis, MO 63127
(314) 843-4151
Saint Louis, MO 63127
(314) 843-4151
Gr: 7-12 | 88 students Student-teacher ratio: 6:1 Avg. class size: 15 students Acceptance rate: 70% Tuition listed
Frequently Asked Questions
How many boarding schools are located in Missouri?
There are 4 college-preparatory boarding schools located in Missouri.
What is the average tuition cost of boarding school in Missouri?
The average Missouri boarding school tuition cost is $53,223 per year.
What is the oldest boarding school in Missouri?
Missouri Military Academy, founded in 1889, is the oldest boarding school in Missouri.
What boarding school in Missouri has the lowest acceptance rates?
Principia School has the lowest boarding school acceptance rate (62%) in Missouri.
What boarding school in Missouri has the highest average SAT scores?
Thomas Jefferson School has the highest average SAT scores (1450) in Missouri.
Which boarding schools in Missouri are often viewed compared to one another?
Popular comparisons of boarding schools in Missouri include: Principia School vs. Missouri Military Academy
Recent Articles
Homesickness or a Poor School Fit? How Parents Can Tell the Difference
Learn how to distinguish normal homesickness from signs that a boarding school may not be the right fit, and discover practical strategies for supporting your child through the transition.
Does Boarding School Spending Reduce What Families Can Save for College?
Discover how boarding school tuition can affect college savings, explore financial planning strategies, compare long-term educational investments, and learn how financial aid and careful budgeting can help families balance both important goals.
Four-Year Cost Forecasting for Boarding School Families
Learn how to build a realistic four-year boarding school budget, anticipate future costs, and plan for tuition, travel, and financial aid.