| Angus Valley Montessori, Licensed Child Care Centre | Milton |
| Apples and Angels Montessori School and Day Care, Georgetown - 83 Main St, Licensed Child Care Centre | Georgetown |
| Apples and Angels Montessori School and Day Care, Georgetown - 79 Main St, Licensed Child Care Centre | Georgetown |
| Ashwood Glen School, Licensed Child Care Centre | Burlington |
| Building Blocks Montessori and Preschool, Milton - Bronte St, Licensed Child Care Centre | Milton |
| Building Blocks Montessori and Preschool, Milton - Fourth Line, Licensed Child Care Centre | Milton |
| Burlington Montessori Preschool, Grace United Church, Licensed Child Care Centre | Burlington |
| Burlington Montessori Preschool, St Lukes Anglican Church Parish Hall, Licensed Child Care Centre | Burlington |
| Childventures Early Learning Academy, Burlington, Licensed Child Care Centre | Burlington |
| Childventures Early Learning Academy, Milton, Licensed Child Care Centre | Milton |
| Childventures Early Learning Academy, Oakville, Licensed Child Care Centre | Oakville |
| Clanmore Montessori School, Licensed Child Care Centre | Oakville |
| Cradle 2 Kinder Montessori & Child Care, Licensed Child Care Centre | Oakville |
| Dearcroft Montessori School, Oakville - Dearcroft Trafalgar Crossing, Licensed Child Care Centre | North Oakville |
| Dearcroft Montessori School, Oakville - Lakshore Rd E, Licensed Child Care Centre | Old Oakville |
| Dearcroft Montessori School, Oakville - Rebecca St, Licensed Child Care Centre | Oakville |
| Fairview Glen Montessori School, Licensed Child Care Centre | Burlington |
| First Years Montessori, Licensed Child Care Centre | Burlington |
| Glen Abbey Child Care Centre, Licensed Child Care Centre | Oakville |
| Glen Abbey Montessori School - West Oak Montessori School, Licensed Child Care Centre | Oakville |
| Headon Forest Montessori, Licensed Montessori School | Burlington |
| Heritage Montessori, Licensed Child Care Centre | Oakville |
| Hopedale Montessori School, Oakville - Third Line, Licensed Child Care Centre | Oakville |
| Hopedale Montessori School, Burlington - Orchard Rd, Licensed Child Care Centre | Burlington |
| Hopedale Montessori School, Oakville - Dundas St W, Licensed Child Care Centre | Oakville |
| Hopedale Montessori School, Oakville - William St, Licensed Child Care Centre | Oakville |
| Inkwell Montessori School, Licensed Child Care Centre | Georgetown |
| Kinderhuis Montessori, Licensed Child Care Centre | Oakville |
| La Villa Montessori School, Licensed Child Care Centre | Oakville |
| Lakewood Montessori Christian School, Licensed Child Care Centre | Burlington |
| Learning Blocks Montessori School, Burlington, Licensed Child Care Centre | Burlington |
| Learning Blocks Montessori School, Milton, Licensed Child Care Centre | Milton |
| Learning Blocks Montessori School, Oakville, Licensed Child Care Centre | Oakville |
| Maple Tree Montessori Child Care, Licensed Child Care Centre | Oakville |
| Marian Montessori School, Licensed Child Care Centre | Oakville |
| Montessori Preschool, Licensed Child Care Centre | Burlington |
| Montessori School of Milton, Licensed Child Care Centre | Milton |
| Orange Seeds Montessori Centre, Licensed Child Care Centre | Oakville |
| Peace of Mind Montessori School, Licensed Child Care Centre | Oakville |
| Prestige Montessori School, Licensed Child Care Centre | Oakville |
| Ressel School @ Willowbrae Academy, Licensed Child Care Centre | Burlington |
| Silver Maple Montessori Private School, Licensed Child Care Centre | Milton |
| SimplySmart Child Care Centre & Montessori, Oakville - Iroquois Shore Rd, Licensed Child Care Centre | Oakville |
| SimplySmart Child Care Centre & Montessori, Oakville - Winston Churchill Blvd, Licensed Child Care Centre | Oakville |
| Stirling Montessori Academy, Licensed Child Care Centre | Milton |
| Summerhill Day School, Licensed Child Care Centre | Burlington |
| Tanglewood School, Licensed Child Care Centre | Oakville |
| The Montessori Country School Milton, Licensed Child Care Centre | Milton |
| Trafalgar Ridge Montessori School, Licensed Child Care Centre | Oakville |
| Village Montessori (The), Licensed Child Care Centre | Georgetown |
| Waterdown Montessori School, Licensed Child Care Centre | Burlington |
| Western Heights Montessori Academy, Old Bronte Campus, Licensed Child Care Centre | Oakville |
| Western Heights Montessori Academy, Maple Grove Campus, Licensed Child Care Centre | Oakville |
| Western Heights Montessori Academy, Morrison Campus, Licensed Child Care Centre | Oakville |
| Western Heights Montessori Academy, Oakhill Campus, Licensed Child Care Centre | Oakville |
| Western Heights Montessori Academy, Westoak Campus, Licensed Child Care Centre | Oakville |
| Willowbrae Academy Oakville, Licensed Child Care Centre | Oakville |
