| La Clé, 2 Marsellus Dr, Unit 5 - Barrie, Literacy and Basic Skills | Barrie |
| La Clé, 63 Main St - Penetanguishene, Baby Needs Depot | Penetanguishene |
| La Clé, 63 Main St - Penetanguishene, Centre pour l'enfant et la famille ON y va - Penetanguishene | Penetanguishene |
| La Clé, 63 Main St - Penetanguishene, Children & Youth Mental Health Services | Penetanguishene |
| La Clé, 63 Main St - Penetanguishene | Penetanguishene |
| La Clé, 70 Madelaine Dr - Barrie, Centre pour l'enfant et la famille ON y va - Barrie | Barrie |
| La Clé, Integrated Employment Services, Penetanguishene - Poyntz St | Penetanguishene |
| La Clé, Penetanguishene - Main St, CFRH 88.1 * 106.7 | Penetanguishene |
| La Clé, Penetanguishene - Poyntz St, Adult Education Centre | Penetanguishene |
| La Leche League Canada, Orillia | Orillia |
| Labour Community Services of Peel | Brampton |
| Lagoon City Community Association, Lagoon City | Ramara |
| Lake Country Community Legal Clinic, Bracebridge Office | Bracebridge |
| Lake Country Community Legal Clinic, Huntsville Satellite Office | Huntsville |
| Lake Country Community Legal Clinic, Parry Sound Satellite Office | Bracebridge |
| Lake Country Community Legal Clinic, South River Satellite Office | Machar |
| Lake Huron Coastal Centre, No Physical Address | Goderich |
| Lake of Bays. Fire Department | Lake of Bays Township |
| Lake of Bays. Municipal Office, Baysville, Baysville Public Library | Lake of Bays Township |
| Lake of Bays. Municipal Office, Dwight Branch, Lake of Bays Township Public Library - Dwight Branch | Lake of Bays Township |
| Lake of Bays. Municipal Office | Lake of Bays Township |
| Lake Simcoe Region Conservation Authority | Newmarket |
| Lake Simcoe Region Conservation Authority [Central East], Bradford West Gwillimbury, Scanlon Creek Conservation Area | Bradford West Gwillimbury |
| Lake Simcoe Region Conservation Authority [Central East], Bradford West Gwillimbury, Scanlon Creek Nature Centre - Outdoor Environmental Education Program | Bradford West Gwillimbury |
| Lake Simcoe Retirement Residence and Assisted Living | Orillia |
| Lakefield Animal Welfare Society | Selwyn Township |
| Lakefield Community Food Bank | Selwyn Township |
| Lakefield Cooperative Nursery School | Selwyn Township |
| Lakefield Golden Years Club | Selwyn Township |
| Lakefield Historical Society, Lakefield - Mailing Address | Lakefield |
| Lakefront Utility Services Inc | Cobourg |
| Lakehead University, Heritage Place, Lakehead University Faculty of Education | Orillia |
| Lakehead University, Humanities 101, Orillia - University Ave | Orillia |
| Lakehead University, Office of Indigenous Initiatives, Orillia - University Ave, Office of Indigenous Initiatives | Orillia |
| Lakehead University, Orillia - University Ave, Orillia Campus | Orillia |
| Lakehead University, Student Accessibility Services, Orillia - University Ave | Orillia |
| Lakehead University, Student Health and Wellness, Orillia - University Ave | Orillia |
| Lakelands Association of REALTORS®, The | Huntsville |
| Lakeridge Health Corporation, Oshawa, Pinewood Centre, Mental Health and Addictions Program at Lakeridge Health | Oshawa |
| Lakeridge Health Oshawa, Whitby - Pinewood Centre - Cochrane St, Women's Residential Treatment Program, Pinewood Centre, Whitby - Cochrane St | Whitby |
| Lakeshore Shrine Club | Port Hope (Municipality of) |
| Lakeshore United Church, Goderich - North St | Goderich |
| Lakeside Retirement at Innisfil | Innisfil |
| Lakeside Women's Clinic, Barrie | Barrie |
| Lakeview Christian School | Bluewater |
| Lakeview Conservative Mennonite Church | Bluewater |
| Landlord's Self Help Centre | Toronto |
| Landmark Bus Lines | Barrie |
| Landmark Bus Lines, Barrie Office, Landmark Bus Lines, Barrie Office | Barrie |
| Landmark Bus Lines, Collingwood Office, Landmark Bus Lines, Collingwood Office | Collingwood |
| Landmark Bus Lines, Collingwood Office, Transit PLUS | Collingwood |
| Lang Pioneer Village Museum | Otonabee-South Monaghan |
| Lang Residence | Gravenhurst |
| L'Arche Stratford | Stratford |
| Launch Pad Youth Activity and Technology Centre, Adult Program | Hanover |
| Launch Pad Youth Activity and Technology Centre | Hanover |
| Laurier Council 2004 Knights of Columbus, Midland, Laurier Council 2004, Knights of Columbus | Midland |
| Law Society of Ontario, Law Society Referral Service | Toronto |
| Le Goût de vivre | Lafontaine |
| Leacock Care Centre | Orillia |
| Leacock Museum National Historic Site | Orillia |
| Leads Employment Services, Owen Sound, Integrated Employment Services, Owen Sound | Owen Sound |
| Leads Employment Services, Stratford, Integrated Employment Services, Stratford | Stratford |
| Learning Disabilities Association of York-Simcoe | Richmond Hill |
| Learning In Leisure Peterborough | Peterborough |
| Learning Jungle, Barrie - Mapleview Campus | Barrie |
| Leduc Counselling Services, Leduc Couselling Services | Central Huron |
| Legal Aid Ontario, Barrie - 75 Mulcaster St, Advice Lawyer for Family Law | Barrie |
| Legal Aid Ontario, Barrie - 85 Bayfield St, Central District Office | Barrie |
| Legal Aid Ontario, Bracebridge, Advice Lawyer for Family Law | Bracebridge |
| Legal Aid Ontario, Cobourg, Duty Counsel Office, Cobourg | Cobourg |
| Legal Aid Ontario, Collingwood, Advice Lawyer for Family Law | Collingwood |
| Legal Aid Ontario, Huron County Office | Goderich |
| Legal Aid Ontario, Midland, Advice Lawyer for Family Law | Midland |
| Legal Aid Ontario, Orangeville, Duty Counsel Office (Criminal and Family), Orangeville | Orangeville |
| Legal Aid Ontario, Orillia, Advice Lawyer for Family Law | Orillia |
| Legal Aid Ontario, Owen Sound | Owen Sound |
| Legal Aid Ontario, Peterborough - 364 Water St, Peterborough Area Legal Aid Office | Peterborough |
| Legal Aid Ontario, Peterborough - 470 Water St, Duty Counsel Office (Family), Peterborough - 470 Water St | Peterborough |
| Legal Aid Ontario, Peterborough - 70 Simcoe St, Duty Counsel Office (Criminal), Peterborough - 70 Simcoe St | Peterborough |
| Legal Aid Ontario, Walkerton | Brockton |
| Legal Line, Online Services | Toronto |
| Legion Village, Branch 133 | Cobourg |
| Lenscrafters, Barrie, One Sight Program | Barrie |
| Leta Brownscombe Co-operative Homes Inc., Leta Brownscombe Co-operative Homes Inc | Peterborough |
| Leukemia and Lymphoma Society of Canada - Ontario Region | North York East |
| Liberal Party of Canada, Barrie-Innisfil Federal Electoral District Association | Barrie |
| Liberal Party of Canada, Barrie-Springwater-Oro-Medonte Federal Electoral District Association | Barrie |
| Liberal Party of Canada (Ontario), Simcoe-Grey Federal Liberal Riding Association | Collingwood |
| Lice Squad.com | Barrie |
| Lice Wars Removal Force | Penetanguishene |
| Life After Stroke, Peterborough, Life After Stroke Peterborough | Peterborough |
| Life Directions Employment | Grey Highlands |
| LifeLabs, Listowel | Listowel |
| LifeLabs, Stratford | Stratford |
| LifeLabs, Barrie - Bayview Dr, Medical Laboratory Services and ECG Testing | Barrie |
| LifeLabs, Barrie - Huronia Rd, Medical Laboratory Services and ECG Testing | Barrie |
| LifeLabs, Barrie - Lakeside Terrace, Medical Laboratory Services | Barrie |
| LifeLabs, Barrie - Quarry Ridge Rd, Medical Laboratory Services and ECG Testing | Barrie |
| LifeLabs, Barrie - Wellington St W, Medical Laboratory Services and ECG Testing | Barrie |
| LifeLabs, Borden | Adjala-Tosorontio |
| LifeLabs, Innisfil, Medical Laboratory Services | Innisfil |
| LifeLabs, Penetanguishine | Penetanguishene |
| Lifeline | Toronto |
| Lighthouse Fellowship Baptist Church | Kincardine |
| Lighthouse Retreat, Peterborough - Sherbrooke Heights Retirement Residence | Peterborough |
| Lily Dempsey Women's Institute, North Perth - No Physical Address | North Perth |
| Lindsay Canadian Club | |
| Lindsay Centre for Preschool Enrichment, Lindsay Montessori Preschool | Kawartha Lakes |
| Lindsay Family Court | Kawartha Lakes |
| Lindsay Farmer's Market | Lindsay |
| Lindsay Seniors Association | Kawartha Lakes |
| Lindsay Transit and LIMO Specialized Transit | Kawartha Lakes |
| Lindsay Ultrasound and X-Ray, Kawartha Lakes Ultrasound and X-ray | Kawartha Lakes |
| Line Dancing Classes, Barrie - St George's Anglican Church | Barrie |
| Lions Club International, Bewdley - Mailing Address, Bewdley and District Lions Club | Hamilton Township |
| Lions Club International, Brighton - Mailing Address, Lions Club of Brighton | Brighton (Municipality of) |
| Lions Club International, Cobourg - Elgin St E, Lions Club of Cobourg | Cobourg |
| Lions Club International, Port Hope Lions Club | Port Hope (Municipality of) |
| Lions Club of Barrie | Barrie |
| Lions Club of Bracebridge | Bracebridge |
| Lions Club of Cambellford, Lions Club Campbellford | Trent Hills |
| Lions Club of Monkton | North Perth |
| Lions Club of Peterborough, Peterborough Lions Community Centre | Peterborough |
| Lions Club of Stratford | Stratford |
| Lions Club of Wingham | North Huron |
| Lions Club, Milverton, Milverton, Lions Club of Milverton | Perth East |
| Lions Foundation of Canada Dog Guides, Dog Guide Programs | Oakville |
| Lions Foundation of Canada Dog Guides, Orillia, Pet Value Walk for Dog Guides | Orillia |
| Lion's Head and District Food Bank | Northern Bruce Peninsula |
| Lion's Head Community Bottle Fund, Lion's Head, Free Seniors Christmas Dinner | Northern Bruce Peninsula |
| Listowel Agricultural Society | North Perth |
| Listowel Bible Chapel | North Perth |
| Listowel Christian School | North Perth |
| Listowel Community Church | North Perth |
| Listowel Curling Club | North Perth |
| Listowel Evangelical Missionary Church | North Perth |
| Listowel Horseshoes | North Perth |
| Listowel Mennonite Church | North Perth |
| Listowel Mental Health Outpatient Services | North Perth |
| Listowel Minor Baseball Association | North Perth |
| Listowel Minor Hockey Association | North Perth |
| Listowel Minor Soccer, Mailing Address | North Perth |
| Listowel Pentecostal Church | North Perth |
| Listowel Taxi | North Perth |
| Listowel Wingham Hospitals Alliance, Listowel Memorial Hospital | North Perth |
| Listowel Wingham Hospitals Alliance, Wingham and District Hospital | North Huron |
| Listowel-Wingham and Area Family Health Team, Listowel, Listowel-Wingham and Area Family Health Team - Listowel | North Perth |
| Listowel-Wingham and Area Family Health Team, Listowel-Wingham and Area Family Health Team - Wingham, Wingham | North Huron |
| Listowel-Wingham and Area Family Health Team, North Perth Breastfeeding Clinic, Listowel | North Perth |
| Literacy Ontario Central South, Literacy and Basic Skills Support Organization | Peterborough |
| Literacy Society of South Muskoka, Gravenhurst, Literacy and Basic Skills | Gravenhurst |
| Little Beginnings Daycare and Learning Centre, Kincardine - Queen St | Kincardine |
| Little Britain Community Food Bank | Kawartha Lakes |
| Little Falls Co-operative Homes | St Marys |
| Little Start Child Care, Barrie | Barrie |
| Living Green Barrie | Barrie |
| Living Hope Centre, Food Basket | Saugeen Shores |
| Living Hope Centre | Saugeen Shores |
| Livita Barrington Retirement Residence | Barrie |
| Liz Acs Home Care Services, Mobile Service | Tay |
| LMC Diabetes and Endocrinology Centre, Barrie | Barrie |
| Loaves and Fishes Food Bank | Perth East |
| Loblaw Pharmacy, Hanover | Hanover |
| Loblaw Pharmacy, McDonald's Independent Grocery, St. Marys | St Marys |
| Loch Lomond Rebekah Lodge 248 Campbellford | Trent Hills |
| Locomotion Day Care Centre, Main Station, Locomotion Day Care Centre, Main Station | New Tecumseth |
| Locomotion Day Care Centre, South Station, Locomotion Day Care Centre, South Station | New Tecumseth |
| LOFT Community Services, Bradford House, Support Services | Bradford West Gwillimbury |
| LOFT Community Services, Housing Services, Bradford House | Bradford West Gwillimbury |
| Londesborough United Church | Central Huron |
| London Bridge Childcare Services Inc., Exeter Elementary Learning Centre | South Huron |
| London Bridge Childcare Services Inc., Hensall Bluewater Coast Early Learning Centre | Bluewater |
| London Bridge Childcare Services Inc., Relouw Early Childhood Learning Centre - Exeter | South Huron |
| London Bridge Childcare Services Inc., Zurich, West Huron Early Childhood Learning Centre - Zurich | Bluewater |
| London Health Sciences Centre, Victoria Hospital, Pregnancy Options Program | London |
| Lonely No More Program, No Physical Address, Virtual only | |
| Longford Community Centre | Ramara |
| Look Good Feel Better, Barrie | Barrie |
| Lorrie's Footcare, Mailing address | Cobourg |
| Love From The Heart Homecare | Barrie |
| Lovesick Lake Native Women's Association | Selwyn Township |
| Lucan Taxi | Lucan Biddulph |
| Lucknow Pharmasave | Lucknow |
| LUDUH, Designated Drivers, Barrie | Barrie |
| Lullaboo Nursery and Childcare Center, Bradford Campus | Bradford West Gwillimbury |
| Lupus Ontario | |
| Lupus Ontario, Online/Web Service, Online Support Group | |
| Lutheran Church of the Good Shepherd, Barrie - 222 Steel St, Martin Luther Court | Barrie |
| Lutheran Church of the Good Shepherd, Barrie - Mapleview Dr W | Barrie |
| Lyndsey Stevenato Children's Therapy Services, Barrie | Barrie |
| Lyrica Choir | Barrie |