| La Leche League Canada, Burlington Group - No Physical Address, Breastfeeding Support Group | Burlington |
| La Leche League Canada, Milton Group - No Physical Address, Breastfeeding Support Group | Milton |
| La Leche League Canada, Oakville Group, Breastfeeding Support Group | Oakville |
| Lab Rescue, Labrador Retriever Adoption Service | Oakville |
| Labour Community Services of Peel | Brampton |
| Ladies Marathon Bridge Club of Oakville | Oakville |
| Ladies Over 35 Indoor Soccer | Oakville |
| Lakeshore Woods Medical Clinic | Oakville |
| Lakeshore Woods Pharmacy | Oakville |
| Lakewood Montessori School, Licensed Child Care Centre | Burlington |
| Lama Yeshe Ling Tibetan Buddhist Group, Meditation Classes, Buddhist Philosophy and Prayer Services | Burlington |
| Landlord and Tenant Board | Toronto Downtown Central |
| Landlord's Self Help Centre | Toronto Downtown Central |
| Landscape Ontario, Halton Office, Get Ready for Opportunities at Work (GROW) Program | Milton |
| LaSalle Park Marina | Burlington |
| LaSalle Park Retirement Community | Burlington |
| Last Post Fund | Ontario |
| Latow Photographers Guild | Burlington |
| Laurier Medical and Walk In Clinic | Milton |
| Law Society of Ontario | Toronto Downtown Central |
| Law Society of Ontario, Law Society Emergency Family Referral Phone Line | Toronto Downtown Central |
| Law Society of Ontario, Law Society Referral Service | Toronto Downtown Central |
| Lawson Park Family Tennis Club | Oakville |
| LCBO, Bring Your ID Card (BYID) | Toronto Downtown |
| Leander Boat Club of Hamilton | Hamilton Central |
| Leander Boat Club of Hamilton, Learn to Row, Recreational and Competitive Rowing | Hamilton Central |
| Leander Boat Club of Hamilton, Rowing Programs | Hamilton Central |
| Lear Communication | Hamilton East |
| 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 |
| Learning Disabilities Association of Halton-Hamilton | Burlington |
| Learning Disabilities Association of Ontario | Etobicoke |
| Learning Tree Childcare, Licensed Child Care Centre | Georgetown |
| Legal Aid Ontario, Provincial Head Office | Toronto Downtown Central |
| Legal Aid Ontario, Refugee Law Office | Toronto Downtown Central |
| Legal Line | York |
| Les Coccinelles, Oakville - École élémentaire Patricia Picknell, Licensed Child Care Centre | Oakville |
| Les Coccinelles, Burlington - École Élémentaire Renaissance, Licensed Child Care Centre | Burlington |
| Les Coccinelles, EarlyON Child and Family Centre | Milton |
| Les Coccinelles, Milton - École élémentaire Dyane-Adam, Licensed Child Care Centre | Milton |
| Les Coccinelles, Milton - École élémentaire Sainte-Anne, Licensed Child Care Centre | Milton |
| Les Coccinelles, Oakville - École élémentaire catholique Ste-Marie, Licensed Child Care Centre | Oakville |
| Les Coccinelles, Oakville - École élémentaire du Chêne, Licensed Child Care Centre | Oakville |
| Les Petites Perles, Licensed Child Care Centre | Oakville |
| Lesbian Gay Bi Trans YouthLine | Toronto Downtown Central |
| Leukemia and Lymphoma Society of Canada - Ontario Region | North York East |
| Lice Squad, Hamilton-Burlington, Lice Removal Products and Services | Burlington |
| Lice Squad.com, Niagara Regional Franchise | Niagara Falls |
| Life Hearing Solutions, Oakville Clinic, Hearing Services | Oakville |
| Lifecare Rx Pharmacy | Oakville |
| LifeChurch | Burlington |
| LifeLabs, Oakville - Trafalgar Rd, Medical Laboratory Services | Oakville |
| LifeLabs, Oakville - Speers Rd W, Medical Laboratory Services | Oakville |
| LifeLabs, Oakville - Rebecca St, Medical Laboratory Services | Oakville |
| LifeLabs, Oakville - River Glen Blvd, Medical Laboratory Services | Oakville |
| LifeLabs, Milton - Commercial St, Medical Laboratory Services | Milton |
| LifeLabs, Milton - Bronte St S, Medical Laboratory Services | Milton |
| LifeLabs, Georgetown - Sinclair Ave, Medical Laboratory Services | Halton Hills |
| LifeLabs, Georgetown - Princess Anne Dr, Medical Laboratory Services | Halton Hills |
| LifeLabs, Oakville - Hospital Gate, Medical Laboratory Services | Oakville |
| LifeLine Canada Foundation (The) | British Columbia |
| Lifemark Seniors Wellness | Mississauga |
| Lifemark Seniors Wellness, Halton, Exercise and Falls Prevention Classes | Halton Region |
| Lifemark Seniors Wellness, Milton - Birkdale Place Retirement Residence, Community Step Up Program | Milton |
| Lighthouse Program for Grieving Children | Oakville |
| Limehouse Presbyterian Church | Halton Hills |
| Linbrook School | Oakville |
| Links2Care, Oakville, Community Support Services | Oakville |
| Links2Care, Acton Satellite - Wallace St, EarlyON Child and Family Centre | Acton |
| Links2Care, Acton, Care At Home - Congregate Dining | Acton |
| Links2Care, Acton, Care in the Community - Care Navigation | Acton |
| Links2Care, Acton, Care In The Community - Community Volunteer Income Tax Program | Acton |
| Links2Care, Acton, Care In The Community - Shop and Drop Support Program | Acton |
| Links2Care, Acton, Community Support Services | Acton |
| Links2Care, Acton, Supportive Housing | Acton |
| Links2Care, Georgetown - Joseph Gibbons Public School, Licensed Child Care Centre | Georgetown |
| Links2Care, Georgetown - Park Public School, Licensed Child Care Centre | Georgetown |
| Links2Care, Georgetown Satellite - James St, EarlyON Child and Family Centre | Georgetown |
| Links2Care, Georgetown, Care At Home - Bathing Assistance | Georgetown |
| Links2Care, Georgetown, Care At Home - Congregate Dining | Georgetown |
| Links2Care, Georgetown, Care At Home - Friendly Visiting | Georgetown |
| Links2Care, Georgetown, Care At Home - Home Help | Georgetown |
| Links2Care, Georgetown, Care At Home - Hot and Frozen Meals | Georgetown |
| Links2Care, Georgetown, Care In The Community - Phone Assurance Program | Georgetown |
| Links2Care, Georgetown, Community Support Services | Georgetown |
| Links2Care, Oakville, Care At Home - Bathing Assistance | Oakville |
| Links2Care, Oakville, Care At Home - Community Navigation | Oakville |
| Links2Care, Oakville, Care At Home - Friendly Visiting | Oakville |
| Links2Care, Oakville, Care At Home - Home Help | Oakville |
| Links2Care, Oakville, Care At Home - Home Maintenance and Repair | Oakville |
| Links2Care, Oakville, Care At Home - Relief for Caregivers | Oakville |
| Links2Care, Oakville, Connection in Action | Oakville |
| Lions Club of Milton | Milton |
| Lions Foundation of Canada Dog Guides | Oakville |
| Lions Valley Athletics | Oakville |
| Literacy South Halton, Burlington Head Office, Literacy and Basic Skills | Burlington |
| Literacy South Halton, Oakville Satellite Office, Literacy and Basic Skills | Oakville |
| Literal Change | Toronto Downtown West |
| Literary Cafe | Oakville |
| Little Feet Big Dreams Child Care Centre, Licensed Child Care Centre | Oakville |
| Little Friends Preschool, Licensed Child Care Centre | Burlington |
| Little Hands Daycare Centre, Licensed Child Care Centre | Milton |
| Little Kids Day Care Centre, Grosvenor Street, Licensed Child Care Centre | Oakville |
| Little Kids Day Care Centre, Kingsridge Drive, Licensed Child Care Centre | Oakville |
| Little Leaders Licensed Home Child Care Agency, Licensed Home Child Care Agency | Burlington |
| Little People of Ontario | Toronto |
| Living Hope Church | Georgetown |
| Living Rock Ministries, Hamilton Central - 30 Wilson St - Living Rock Ministries | Hamilton Central |
| Living Rock Ministries, Hamilton Central - 30 Wilson St - Stacey's Place Youth Food Bank and Rock Shop, Stacey's Place Youth Food Bank and Rock Shop | Hamilton Central |
| LMC Diabetes and Endocrinology, Diabetes and Endocrinology | Oakville |
| LMC Diabetes and Endocrinology, Georgetown, Diabetes and Endocrinology | Halton Hills |
| LMC Pharmacy, Pharmacy Services | Oakville |
| Local Planning Appeal Tribunal | Toronto Downtown |
| Local Transit and Bus Services in Halton Region | Halton Region |
| London Middlesex Counselling and Addiction Services, First Nations Counselling | London |
| Lori McDonald RDH, Mobile Dental Hygiene Service | Burlington |
| Lost Wallet, Burlington | Burlington |
| Lost Wallet, Oakville | Oakville |
| Lowville United Church | Burlington |
| LSV Pharmacy and Walk-in Clinic, Walk-in Medical Clinic | Burlington |
| LSV Pharmacy and Walk-in Clinic, Pharmacy Services | Burlington |
| Lung Association (The) - Ontario | North York East |
| Lung Cancer Canada | Toronto Downtown Central |
| Lupus Ontario, Hamilton Central, Hamilton & Area Support Group | Hamilton Central |
| Lyme Ontario | Ancaster |
| LymeHope | Burlington |
| Lymphedema Association of Ontario | Etobicoke South |
