BoardingSchoolReview.com lists 16 boarding schools as Independent Schools Association of the Central States (ISACS) members, serving 6,327 students. Learn more about the association at Independent Schools Association of the Central States (ISACS).
Membership data comes from the schools themselves and from published association directories. See all school associations.
Independent Schools Association of the Central States (ISACS) Member Schools (2026-27)
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
PO Box 801 39221 Woodward Ave.
Bloomfield Hills, MI 48303
(248) 645-3610
Bloomfield Hills, MI 48303
(248) 645-3610
Gr: 9-12 | PK-12 (day) | 810 students Student-teacher ratio: 8:1 Avg. class size: 16 students Acceptance rate: 38% Tuition listed
1300 Academy Road
Culver, IN 46511
(574) 842-7100
Culver, IN 46511
(574) 842-7100
Gr: 9-12 | 835 students Student-teacher ratio: 6:1 Avg. class size: 14 students Acceptance rate: 49% Tuition listed
11530 Madison Road
Huntsburg, OH 44046
(440) 357-0918
Huntsburg, OH 44046
(440) 357-0918
Gr: 8-12, PG | 7-12, PG (day) | 51 students Student-teacher ratio: 10:1 Avg. class size: 10 students Acceptance rate: 87% Tuition listed
4000 J Maddy Pkwy
Interlochen, MI 49643
(231) 276-7472
Interlochen, MI 49643
(231) 276-7472
Gr: 9-12, PG | 579 students Student-teacher ratio: 6:1 Avg. class size: 11 students Tuition listed
La Lumiere School ![La Lumiere School Photo - La Lumiere School is a private, independent boarding and day school founded in 1963, located in La Porte, Indiana, on an idyllic 190-acre wooded campus. At La Lumiere, we form character, cultivate scholarship, and explore faith in order to grow into more complete versions of ourselves.]( "La Lumiere School Photo - La Lumiere School is a private, independent boarding and day school founded in 1963, located in La Porte, Indiana, on an idyllic 190-acre wooded campus. At La Lumiere, we form character, cultivate scholarship, and explore faith in order to grow into more complete versions of ourselves.")
(Catholic)
6801 N. Wilhelm Road
La Porte, IN 46350
(219) 326-7450
La Porte, IN 46350
(219) 326-7450
Gr: 9-12, PG | 160 students Student-teacher ratio: 7:1 Avg. class size: 10 students Tuition listed
60 Knox Lane
Wheeling, WV 26003
(304) 233-1436
Wheeling, WV 26003
(304) 233-1436
Gr: 7-12 | 5-12 (day) | 447 students Student-teacher ratio: 7:1 Avg. class size: 12 students Acceptance rate: 65% Tuition listed
804 Dr Robert K Wallace Drive
Fairfield, IA 52556
(641) 472-9400
Fairfield, IA 52556
(641) 472-9400
Gr: 9-12 | PK-12 (day) | 184 students Student-teacher ratio: 5:1 Avg. class size: 12 students Acceptance rate: 85% Tuition listed
1215 Rice Lake Rd
Duluth, MN 55811
(218) 727-7266
Duluth, MN 55811
(218) 727-7266
Gr: 8-12 | K-12 (day) | 456 students Student-teacher ratio: 10:1 Avg. class size: 15 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
1101 Genesee Street
Delafield, WI 53018
(262) 646-7199
Delafield, WI 53018
(262) 646-7199
Gr: 7-12, PG | 235 students Student-teacher ratio: 13:1 Avg. class size: 12 students Acceptance rate: 84% Tuition listed
Saint John's Preparatory School ![Saint John's Preparatory School Photo - We are located on 2900 of woodlands and lakes in Collegeville, MN]( "Saint John's Preparatory School Photo - We are located on 2900 of woodlands and lakes in Collegeville, MN")
(Catholic)
2280 Watertower Road
Collegeville, MN 56321
(320) 363-3315
Collegeville, MN 56321
(320) 363-3315
Gr: 8-12, PG | 6-12, PG (day) | 280 students Student-teacher ratio: 11:1 Avg. class size: 18 students Acceptance rate: 88% Tuition listed
5201 SPIRE Circle
Geneva, OH 44041
(440) 466-1002
Geneva, OH 44041
(440) 466-1002
Gr: 9-12, PG | 240 students Student-teacher ratio: 10:1 Avg. class size: 12 students Acceptance rate: 80% 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: 12 students Acceptance rate: 70% Tuition listed
115 College Street
Hudson, OH 44236
(330) 650-9717
Hudson, OH 44236
(330) 650-9717
Gr: 9-12, PG | 431 students Student-teacher ratio: 6:1 Avg. class size: 12 students Acceptance rate: 39% Tuition listed
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