| Mango Languages |
| March of Dimes Canada (GTA) |
| Marine Heritage Society and Propeller Club |
| Markdale and District Food Bank, Christmas Assistance |
| Markdale and District Food Bank |
| Markdale Baptist Church |
| Markdale Community Church of the Nazarene, Markdale |
| Markdale Flesherton Senior Citizens Club |
| Markdale IDA Pharmacy |
| Martin's School Transit |
| McKechnie Pharmacy |
| McKenzie's Pharmacy - IDA |
| Meaford Church of Christ |
| Meaford Food Bank and Outreach, Christmas Assistance, Meaford |
| Meaford Food Bank and Outreach, Food Bank, Meaford |
| Meaford Food Bank and Outreach, Meaford |
| Meaford Hall Arts & Cultural Centre |
| Meaford Harvest Church |
| Meaford IDA Pharmacy |
| Meaford Long Term Care Centre Auxiliary |
| Meaford Public Library |
| Meaford United Church |
| Meaford. Municipal Office, Meaford Fire Department |
| Meaford. Municipal Office, Meaford Museum (The) |
| Meaford. Municipal Office, Meaford Moves+ |
| Meaford. Municipal Office |
| Meal on the Hill, Trinity Anglican Church |
| Meeting Place Tobermory (The), Community Food Programs |
| Meeting Place Tobermory (The) |
| Mercy Hill Christian Fellowship |
| Métis Nation of Ontario - Great Lakes Metis Council, Owen Sound, Great Lakes Metis Council |
| Métis Nation of Ontario - Great Lakes Metis Council, Owen Sound, Healing and Wellness Branch |
| Midwives Grey Bruce |
| Military Family Resource Centre Meaford |
| Mission Thrift Store (The) |
| MS Canada |
| Mt Pleasant Evangelical Missionary Church |
| Mulock Christian Fellowship |
| Muscular Dystrophy Canada - Ontario Regional Office |
| M'Wikwedong Indigenous Friendship Centre |
| My Friend's House, Domestic Violence Shelter |