Organization / Program Name(s) Located In
Macaulay Tree House Day NurseryBracebridge
MacDonald's LandscapingCollingwood
MacLaren Art Centre, Art Classes and Day Camps for Children and YouthBarrie
MacLaren Art CentreBarrie
Madeline's Mobile Hair Care, No physical addressOrillia
Make-A-Wish, Ontario ChapterPickering
Making Change, Mailing AddressBarrie
Manito Shriner's ClubClearview (Simcoe County)
Maplehill Wellness, Barrie, Foot CareBarrie
Maplehill WellnessWasaga Beach
Mapleview Community Church, BarrieBarrie
Mapleview Medical PharmacyBarrie
Maplewood Retirement ResidencePenetanguishene
March of Dimes Canada, Barrie - Bryne Dr, Brain Injury Services - Outreach Activity Groups in Simcoe CountyBarrie
March of Dimes Canada, Barrie - Georgian Mall, Next Steps Walking ProgramBarrie
March of Dimes Canada, Collingwood, Assisted Living Services and Low Acuity Services - Community Support Services ProgramCollingwood
March of Dimes Canada, Homemaking Services, CollingwoodCollingwood
March of Dimes Canada, Mailing Address - Barrie and York Region, Befriending ProgramRichmond Hill
March of Dimes Canada, Mailing Address - Orillia, Summer Recreation ProgramOrillia
March of Dimes Canada, Midland, Assisted Living Services and Low Acuity Services - Community Support Services ProgramMidland
March of Dimes Canada, Midland, Homemaking ServicesMidland
March Of Dimes Canada - Midland, Midland, Community Support ServicesMidland
March of Dimes Canada (GTA)Toronto
Marchmont Baptist Church, SevernSevern
Mariposa Arts Theatre FoundationOrillia
Mariposa Folk FoundationOrillia
Mariposa Grandmothers for Stephen Lewis Foundation (SLF)Orillia
Mariposa Gymnastics ClubOrillia
Mariposa House HospiceSevern
Mariposa PlaceOrillia
Mariposa Wrestling ClubOrillia
Marlene's Foot CareClearview (Simcoe County)
Martyrs' ShrineMidland
Matheson Chiropratic Clinic, OrilliaOrillia
Matthews House, Community and Residential Hospice, Community Support Services, Home HealthcareNew Tecumseth
Maximum Mobility Access CentreOrillia
May Court Club of BarrieBarrie
May Court Club of Barrie, BarrieBarrie
May Court Club of Barrie, Barrie, May Court ShopBarrie
MBA - Midland Basketball Association, Midland Mystics Girls' League and Midland Magic Boys' LeagueMidland
McDermid (Pamela), Collingwood, Registered Social WorkerCollingwood
Mckendry (Susan) CBT Counselling - CBTatHomeBarrie
McQuaig (Wendy), Orillia, Registered PsychotherapistOrillia
Meadow Creek Montessori School, Barrie - Cundles Rd E, Meadow Creek Montessori School - EastBarrie
Meadow Creek Montessori School, Barrie - Ferndale Dr N, Meadow Creek Montessori School - WestBarrie
Meadow Creek Montessori School, Shanty Bay, Meadow Creek Montessori School - The Bay 
Meals On Wheels, AllistonNew Tecumseth
Meaningful Movement, Mobile Service, In-Home PhysiotherapyBarrie
Mediation Centre of Simcoe CountyBarrie
Medical Mobility Assist Loan Program, Gravenhurst, Medical Mobility Assist Loan Program.Gravenhurst
MedicAlert Foundation CanadaNorth York East
Meeting Place (The), OrilliaOrillia
Mens Industrial Dart LeagueCollingwood
Mermigis (Dr Lambros) PsychologistBarrie
Mete (Laurie Ann), Certified Advanced Foot CareSpringwater
Métis Nation of Ontario, Barrie Office, Infinity Property Services - Rural Urban Indigenous Housing ProgramBarrie
Métis Nation of Ontario - Georgian Bay Council - Midland, Education and Training, MidlandMidland
Métis Nation of Ontario - Georgian Bay Council - Midland, Healing and Wellness Program, MidlandMidland
Métis Nation of Ontario - Georgian Bay Council - Midland, Metis Healthy Babies, Healthy Children, MidlandMidland
Midhurst Ratepayers' AssociationSpringwater
Midhurst Tennis ClubSpringwater
Midland Alliance ChurchMidland
Midland and District Business Women's AssociationMidland
Midland and District Lawn Bowling ClubMidland
Midland Bay Sailing ClubMidland
Midland Bridge ClubMidland
Midland Civitan Club, MidlandMidland
Midland Community Gardens, Midland Community GardenMidland
Midland Cultural Centre, King St, Midland Cultural Centre (MCC)Midland
Midland Curling ClubMidland
Midland District Camera Club, No physical addressMidland
Midland Flyers Jr C Hockey TeamMidland
Midland Hiking Club (The)Midland
Midland Horticultural SocietyMidland
Midland Keegos Aquatic ClubMidland
Midland Lions ClubMidland
Midland Midwives By the BayMidland
Midland Midwives By the Bay, Chigamik-Waypoint Community Health HubMidland
Midland Minor Hockey AssociationMidland
Midland Minor Lacrosse Association, Midland Titans LacrosseMidland
Midland Mountainview Family Co-operative, MidlandMidland
Midland Penetanguishene Baseball AssociationMidland
Midland Physiotherapy and Rehabilitation CentreMidland
Midland Public Library, Food PantryMidland
Midland Public LibraryMidland
Midland Shuffleboard Club (The)Tay
Midland Small Set Nursery School, St. Pauls United Church, Midland Small Set Co-op Nursery SchoolMidland
Midland Sports Hall of FameMidland
Midland Town CrierMidland
Midland, Penetanguishene and District Builders AssociationMidland
Midland, Town of., Community Reach, Accessible Transit ServiceMidland
Midland, Town of., Midland Penetanguishene Transit ServiceMidland
Midland, Town of., Midland - Bayshore Dr, Fire DepartmentMidland
Midland, Town of., Midland - Dominion Ave, Municipal OfficeMidland
Midland, Town of., Midland - Len Self Blvd - NSSRC, North Simcoe Sports and Recreation CentreMidland
Midland, Town of., Midland - Town Dock- King St, Midland HarbourMidland
Midland, Town of., Pete Petersen Park, Public Boat LaunchMidland
Midland, Town of., Midland Seniors Council, Midland - Len Self Blvd - NSSRCMidland
Midland, Town of., No physical address, Rest Stations for Extreme Weather ReliefMidland
Midland, Town of., Tourism and Special Events, Midland - Dominion AveMidland
Midland-Penetanguishene District Community Emergency Response Team, Colborn StPenetanguishene
Midland-Penetanguishene Field Naturalists Club, Wye Marsh Wildlife Centre - meetings onlyTay
Midwives NottawasagaCollingwood
Mill Creek Care Centre, Long Term Care FacilityBarrie
Minesing Community Association, Minesing Community CentreSpringwater
Minesing Minor Ball AssociationSpringwater
Mirror (The)Midland
Mission Thrift Store - BarrieBarrie
Mnjikaning Arena Sports KiChippewas of Rama First Nation
Mnjikaning Fish Fence CircleOrillia
Mobicare Advanced Foot CareBarrie
Mobile Footcare Service, Bring Joy 2 Your FeetPenetanguishene
Modern College of Hairstyling and EstheticsBarrie
Mom Concierge, Mailing address, Services for Birth, Breastfeeding, and Beyond!Barrie
Mom's 4 Mom's Doula Services, No Physical AddressOro-Medonte
Monarchist League Barrie Huronia Branch 
Monday Nights Dart LeagueCollingwood
Mood Disorders Association of Ontario, Telephone Support LineToronto Downtown
Mortgage Centre (The), Christmas Hamper ProgramCollingwood
MS Canada, Mailing Address, Barrie Support GroupBarrie
MS Canada, Online/Web Service, Virtual Support Groups 
MS CanadaToronto
MTM Conservation Association, Tiny Marsh Nature Centre, Tiny Marsh Provincial Wildlife AreaTiny
Mulcaster MewsBarrie
Multiple Births CanadaRichmond Hill
MultiSport CanadaBarrie
Murray's Windermere GardensBarrie
Muscular Dystrophy Canada - Ontario Regional OfficeToronto Downtown North
Museum on the BoyneNew Tecumseth
Music Therapy Services of Simcoe County, BarrieBarrie
Muskoka Algonquin Healthcare, Bracebridge - Ann St - South Muskoka Hospital Foundation, South Muskoka Hospital FoundationBracebridge
Muskoka Ambulance Communications ServiceBracebridge
Muskoka Family Works, Huntsville, Muskoka Family Works Mediation and Relationship CoachingHuntsville
Muskoka Gentle DentalHuntsville
Muskoka Lakes PreschoolMuskoka Lakes Township
Muskoka North ResidentialGravenhurst
Muskoka Residential CentreSevern
Muskoka Stretchers, BracebridgeBracebridge
Muskoka TaxiGravenhurst
My Friend Beth Senior & Support Services, CollingwoodCollingwood
My Friend's House, Domestic Violence ShelterCollingwood
My Pre AcademyBarrie
My Sister's PlaceNew Tecumseth