| La Leche League Canada, Brampton Group | Brampton |
| Labour Community Services of Peel Inc | Mississauga |
| Lakeridge Pharmacy | Brampton |
| Lakeshore Community Outreach Centre Inc, The Compass Food Bank & Outreach Centre | Mississauga |
| Lakeside Montessori School | Port Credit |
| Landlord's Self-Help Centre | Toronto Central |
| Langar Seva Meal & Support Services | Woodbridge |
| L'Association des Scouts du Canada, District des Trois-Rives, 16è, les Scouts Couguars , Mississauga, Brampton, une colonie et une meute | Brampton |
| Latino Pharmacy | Mississauga |
| Laugh & Learn Early Learning and Childcare Centre, Laugh & Learn Children's Services Inc. | Brampton (City of) |
| Lawlor Therapy Support Services Inc | Mississauga |
| LDS Family Services | Etobicoke |
| Le Cercle de l'Amitié | Mississauga |
| Le Club Toastmaster Français de Mississauga | Mississauga |
| Le Collège du Savoir | Brampton |
| Le Métropolitain | Brampton |
| Le Petit Kangaroo Child Care Centre Inc. | Brampton (City of) |
| Learna Education Inc. | Brampton |
| Learning Disabilities Association of Peel Region | Mississauga |
| Learning Disabilities Association of Peel Region, Psycho-Educational Assessments | Mississauga |
| Learning Happens Child Care Inc. | Peel Region |
| Learning Jungle School | Cooksville |
| Legal Aid Ontario, Family Duty Counsel Services (Peel) | Mississauga |
| Legal Aid Ontario, Family Duty Counsel Services (Peel), Family Advice Lawyers, Family Law Information Centre | Brampton |
| Legal Aid Ontario, Family Law Service Centre - Peel | Brampton |
| Les Petites Perles | Oakville |
| Lesbian Gay Bi Trans Youth Line | Toronto |
| Let's Buggy | Mississauga |
| Levi Walk-In Clinic | Mississauga |
| Licensed Home Child Care YMCA of Greater Toronto, Licensed Home Child Care | |
| Life Pharmacy | Bolton |
| LifeCall Medical Alarm | Mississauga |
| LifeLabs, Brampton - Bramalea Road | Brampton |
| LifeLabs, Brampton - Finchgate Blvd | Brampton |
| LifeLabs, Brampton, Kennedy Road | Brampton |
| LifeLabs, Brampton-Vodden Street | Brampton |
| LifeLabs, Etobicoke - Humber College Blvd | Etobicoke Central |
| LifeLabs, Etobicoke- Head Office | Etobicoke North |
| LifeLabs, Mississauga - 3427 Derry Road | Malton |
| LifeLabs, Mississauga - Burnhamthorpe Rd | Mississauga |
| LifeLabs, Mississauga - Hurontario St | Mississauga |
| LifeLabs, Orangeville | Orangeville |
| LifeLabs, Shelburne | Shelburne |
| LifeLabs Medical Laboratory Services, Mississauga - Eglinton Ave W PSC | Mississauga |
| LifeLabs Medical Laboratory Services, Mississauga - Meadowvale Town Centre PSC | Mississauga |
| LifeLabs Medical Laboratory Services, Mississauga - Queensway West PSC | Mississauga |
| LifeLabs Medical Laboratory Services, Oakville - Trafalgar Road | Oakville |
| LifeLabs Patient Service Centre, Mississauga - Southdown Rd | Mississauga |
| Lifeline Canada, Brampton Civic Hospital | Brampton |
| Lifemark Physiotherapy North Bramalea | Brampton |
| Light of the World Christian Child Care Centre | Brampton (City of) |
| Lighthouse for Grieving Children, Youth and Families | Oakville |
| Lighthouse Pharmacy | Mississauga |
| LightSpeed Rehabilitation | Mississauga |
| Links2Care | Oakville |
| Lions Club, Bolton and District Lions Club | Bolton |
| Lions Club, Bramalea Lions Club | Brampton |
| Lions Club, Caledon Lions Club | Caledon Village |
| Lions Club, District A-711 Region 6, Mississauga Cooksville Lions Club, #43151 | Mississauga |
| Lions Club, District A-711 Region 6, Mississauga Credit Valley Lions Club, #14930 | Mississauga |
| Lions Club, Huttonville Branch | Brampton |
| Lisgar Woods Pharmacy | Mississauga |
| Little Angels Christian Child Care Centre - 2 | Streetsville |
| Little Angels Christian Childcare Centre | Streetsville |
| Little Bloomers Childcare Centre LTD. | Brampton |
| Little Bright Stars Learning Centre | Erin Mills |
| Little Folks Montessori Inc. | Brampton |
| Little Folks Montessori Pre-School | Cooksville |
| Little Galaxy Childcare & Montessori, Little Galaxy Childcare & Montessori Inc. | Brampton (City of) |
| Little Leaf Daycare | Streetsville |
| Little Leaf Daycare Port Credit | Port Credit |
| Little Rascals Preschool | Streetsville |
| Little Stars Daycare | Brampton |
| Little Superstars Montessori School and Child Care, LSM Child Care Inc. | Cooksville |
| Livewell Pathway Health Care Services | |
| Living Arts Centre | Mississauga |
| Loblaws DRUGStore Pharmacy, Etobicoke - The East Mall | Etobicoke |
| Loblaws DRUGStore Pharmacy, Mississauga - McLaughlin Rd | Mississauga |
| Logos Baptist Church (Mississauga), ESL Classes | Mississauga |
| Lord Dufferin Centre, Retirement Residence | Orangeville |
| Lorne Scots, Peel, Dufferin and Halton Regiment | Brampton |
| Loyal Orange Association, Brampton Lodge 5 | Brampton |
| Lullaboo Childcare Center (Homestead), Lullaboo Homestead Inc. | Brampton |
| Lullaboo Nursery and Child Care Centre - Financial | Brampton |
| Lullaboo Nursery and Child Care Centre - Meadowvale | Meadowvale |
| Lullaboo Nursery and Child Care Centre Inc. - Ninth Line | Streetsville |
| Lullaboo Nursery and Childcare Center - Queen Campus | Brampton |
| Lullaboo Nursery and Childcare Centre - Heartland | Streetsville |
| Lullaboo Wanless INC, Lullaboo Childcare Center- Wanless | |
| Lumenus Community Services, Mental Health, Developmental and Community Services | Etobicoke North |
| Lung Association, Toronto & GTA West | Toronto |
| Lung Association (The), Ontario | North York |
| Lupus Ontario, Online Support Groups | Mississauga |
| Luso Canadian Charitable Society, Mississauga Location | Mississauga (City of) |
| Lynn-Rose School | Mississauga |