| School Name | Address | City |
| Aspire Middle and High School – Learning with Meaning | 301 E. Main St | Missoula |
| Big Sky Discovery Academy | 175 Aspen Leaf Drive | Big Sky |
| Billings Central Catholic High School | 3 Broadwater Ave | Billings |
| Billings Christian School | 4519 Grand Ave. | Billings |
| Blodgettview Christian School | 119 West Bridge Road | Hamilton |
| Bozeman Field School | 2006 Stadium Dr, Suite 102 | Bozeman |
| Bozeman Montessori, LLC | 3774 Equestrian Lane | Bozeman |
| Butte Central Catholic Schools | 9 S. Idaho | Butte |
| Conrad Christian School | 1079 Conrad-Dupuyer Rd | Conrad |
| Cottonwood ALC | 322 Fuller Avenue | Helena |
| Cottonwood Day School | 10180 Cottonwood Road | Bozeman |
| Curious Minds Montessori & Acton Academy | 235 Kurtz Lane | Hamilton |
| Divine Mercy Academy | 601 W. Cameron | Belgrade |
| Educatio Learning Studio | 129 S. Main Street | Livingston |
| Epoch, Inc. | 1778 Moffit Gulch | Bozeman |
| Explore Academy | 1675 Kagy | Bozeman |
| Five Falls Christian School | 2930 Flood Rd. | Great Falls |
| Florence Crittenton Children Enrichment Center | 3404 Cooney Drive | Helena |
| Foothills Community Christian School | 2210 5th Avenue N | Great Falls |
| Free Roots Alternative Learning Center | 8185 Avocet Dr | Helena |
| Grace Montessori Academy | 4809 Grand Ave | Billings |
| Great Falls Central Catholic High School | 2800 18th Ave S | Great Falls |
| Hamilton Christian Academy | 778 Grantsdale Rd. | Hamilton |
| Headwaters Academy | 1005 Durston Rd | Bozeman |
| Helena Christian School | 3384 Canyon Ferry Rd | East Helena |
| Heritage Academy, Incorporated | 315 E. Evergreen Dr. | Kalispell |
| Heritage Christian School | 4310 Durston Rd | Bozeman |
| Highland View Christian School | 2504 Grand Ave | Butte |
| Highlands Latin Cottage School | 711 4th Avenue North | Billings |
| Holy Spirit Catholic School | 2820 Central Ave | Great Falls |
| Kalispell Montessori | 349 Willow Glen Drive | Kalispell |
| Kootenai Valley Christian School | 1024 Montana Avenue | Libby |
| Lighthouse Baptist Academy | 5425 Gharrett Avenueoula | Missoula |
| Loyola Sacred Heart High School | 320 Edith | Missoula |
| Lustre Christian High School | 4 Lustre High Cir | Lustre |
| Manhattan Christian School | 8000 Churchill Road | Manhattan |
| Middle Creek Montessori | 1572 Cobb Hill Road | Bozeman |
| Mission Valley Christian Academy | 38907 MT Hwy 35 | Polson |
| Missoula Christian Montessori School | 301 S. 6th St. West | Missoula |
| Missoula International School | 808 S 3rd St W | Missoula |
| Mount Ellis Academy | 3641 Bozeman Trial Rd | Bozeman |
| Mount Ellis Elementary School | 3835 Bozeman Trail Road | Bozeman |
| Mount Olive Lutheran School | 2336 Saint Johns Ave. | Billings |
| Mountain View Christian School | 1010 Clements Rd | Missoula |
| New Life School of Light | 201 1st Ave | Laurel |
| Nurtured Growth | 1322 Whitefish Stage | Kalispell |
| Opt Out | 80085 Gallatin Road Unit I | Bozeman |
| Our Lady of Lourdes Catholic School | 1305 5th Avenue South | Great Falls |
| Peak Academy | 201 South Willson | Bozeman |
| Petra Academy | 4720 Classical Way | Bozeman |
| Sacred Heart Elementary School | 519 N Center Ave | Miles City |
| Secret Garden Montessori | 4 Sanders Ave | Bozeman |
| Sourdough Montessori | 4310 Sourdough Rd | Bozeman |
| St Andrew School | 1900 Flowerree | Helena |
| St Joseph Elementary and Middle School | 503 Edith Street | Missoula |
| St Jude Thaddeus School | 403 7th Ave | Havre |
| St Mary's Catholic School | 511 South F Street | Livingston |
| St Matthew Parish School | 602 S. Main Street | Kalispell |
| St. Francis Elementary & Middle School | 2202 Colton Blvd | Billings |
| St.Francis Catholic School/Billings Central Catholic High School | 3 Broadwater Ave | Billings |
| Stillwater Christian School | 255 FFA Drive | Kalispell |
| Summit Montessori | 3035 South Russell Street | Missoula |
| Sunrise Montessori School | 805 Alderson Avenue | Billings |
| Sussex School | 1800 S 2nd St W | Missoula |
| Teton Adventist Christian School | 701 1st St NE | Choteau |
| The Learning Bench Academy-Livingston | 1400 Mt. Baldy Drive | Livingston |
| The Way Christian School | 208 Llama Ln | Livingston |
| Treasure State Academy | 100 46th St. N. | Great Falls |
| Trinity Lutheran Classical School | 221 South Center Ave | Miles City |
| Trinity Lutheran School | 2802 Belvedere Drive | Billings |
| Trinity Lutheran School | 495 5th Ave WN | Kalispell |
| Valley Adventist Christian School | 1275 Helena Flats Rd | Kalispell |
| Valley Christian School | 2526 Sunset Lane | Missoula |
| Walnut Academy | 701 Walnut St. | Missoula |
| Whitefish Christian Academy | 820 Ashar Ave. | Whitefish |
| World Family School | 115 East Dickerson Street | Bozeman |