Organization / Program Name(s) Located In
Oasis Centre des femmesToronto
OCD NorthBarrie
OCD WellnessBarrie
Ombudsman OntarioToronto
Ontario Aboriginal Housing ServicesSault Ste. Marie
Ontario Addiction Treatment Centres, Alliston OfficeNew Tecumseth
Ontario Association of Optometrists, Eye See...Eye LearnToronto Downtown Central
Ontario College Application ServiceGuelph
Ontario College of TradesToronto Downtown
Ontario Dental AssociationToronto Downtown North
Ontario Energy Board, Ontario Electricity Support Program (OESP)Ontario
Ontario English Catholic Teachers Association. Simcoe Muskoka UnitBarrie
Ontario Federation of Snowmobile Clubs, Mailing AddressBarrie
Ontario Genealogical Society, Simcoe County Branch - Mailing AddressBarrie
Ontario Health - Trillium Gift of Life NetworkToronto Downtown Central
Ontario Health atHome, Barrie - Sperling DrBarrie
Ontario Health atHome, Barrie - Sperling Dr, TelehomecareBarrie
Ontario Hooking Craft Guild, Mailing AddressMinesing
Ontario Human Rights Commission, 180 Dundas St WToronto Downtown
Ontario Incontinence SuppliesNew Tecumseth
Ontario Motor Vehicle Industry Council, TorontoToronto
Ontario NatureToronto Downtown
Ontario Parents Advocating for Children with CancerBarrie
Ontario Photo CardOntario
Ontario Poison CentreToronto Downtown Central
Ontario Provincial Police, Alliston, Nottawasaga DetachmentNew Tecumseth
Ontario Provincial Police, Wasaga Beach, Huronia West DetachmentWasaga Beach
Ontario Registered Music Teachers Association, Barrie Branch, No Physical AddressBarrie
Ontario Secondary School Teachers' Federation, Barrie, Simcoe County District 17Barrie
Ontario SPCA and Humane Society, Barrie - 91 Patterson Rd, Ontario SPCA - Barrie Animal CentreBarrie
Ontario SPCA and Humane Society, Barrie - 91A Patterson Rd, Marion Vernon Memorial Animal ClinicBarrie
Ontario Track3 Adaptive Sports Association, Toronto - Administrative OfficeToronto
Ontario Vipassana Centre, Egbert, Dhamma Torana 
Ontario Water Centre (The)Georgina
Ontario, Ministry of the Solicitor General, Barrie, Probation and Parole Services, BarrieBarrie
Ontario, Ministry of the Solicitor General, Southwest Region - Midhurst, Ontario Fire MarshallSpringwater
Ontario. Members of Provincial Parliament, Barrie-Innisfil Riding, Provincial Constituency Office - Andrea KhanjinBarrie
Ontario. Members of Provincial Parliament, Provincial Constituency Office - Brian Saunderson, Simcoe-Grey Riding - Stayner Office, Simcoe-Grey Riding - Stayner OfficeStayner
Ontario. Members of Provincial Parliament, Simcoe-Grey Riding - Alliston Office, Provincial Constituency Office - Brian Saunderson, Simcoe-Grey Riding - Alliston OfficeAlliston
Ontario. Members of Provincial Parliament, York-Simcoe Riding, Provincial Constituency Office - Caroline MulroneyEast Gwillimbury
Ontario. Ministry of Advanced Education and Skills Development, Employment Ontario HotlineToronto Downtown
Ontario. Ministry of Children, Community and Social ServicesBarrie
Ontario. Ministry of Children, Community and Social Services, Barrie - 34 Simcoe St, Ontario Disability Support Program - Employment Support ProgramBarrie
Ontario. Ministry of Children, Community and Social Services, Barrie - 34 Simcoe St, Ontario Disability Support ProgramBarrie
Ontario. Ministry of Children, Community and Social Services, Barrie - Bayfield St, Youth Justice DivisionBarrie
Ontario. Ministry of Children, Community and Social Services, Barrie - Ferris Lane, Passport ProgramBarrie
Ontario. Ministry of Children, Community and Social Services, Newmarket Office, Special Services at Home and Assistance for Children with Severe DisabilitiesNewmarket
Ontario. Ministry of Children, Community and Social Services, Post Adoption Disclosure UnitToronto
Ontario. Ministry of Children, Community and Social Services. Family Responsibility OfficeToronto
Ontario. Ministry of Children, Community and Social Services. Victim Support LineToronto
Ontario. Ministry of Economic Development and Growth, Simcoe Muskoka OfficeSpringwater
Ontario. Ministry of Economic Development, Trade and Employment/Ministry of Research and Innovation, 56 Wellesley St. W, Entrepeneur Branch Summer Company ProgramToronto Downtown
Ontario. Ministry of Education, Central East Region, Child Care Quality Assurance and LicensingToronto
Ontario. Ministry of Environment, Conservation and ParksBarrie
Ontario. Ministry of Environment, Conservation and Parks, Aurora District Office, Holland Marsh Provincial Wildlife Management AreaBradford West Gwillimbury
Ontario. Ministry of Environment, Conservation and Parks, Thornbury, Niagara Escarpment CommissionBlue Mountains
Ontario. Ministry of Finance., Oshawa, Retail Sales TaxOshawa
Ontario. Ministry of Government and Consumer Services. Consumer Protection OntarioToronto
Ontario. Ministry of Health, Trillium Drug ProgramEtobicoke
Ontario. Ministry of Health, Health Care ConnectToronto Downtown Central
Ontario. Ministry of Health, Health811Toronto Downtown Central
Ontario. Ministry of Health, Ontario Health Insurance PlanToronto Downtown Central
Ontario. Ministry of Health, Dental Care For Low-Income SeniorsToronto
Ontario. Ministry of Labour, Immigration, Training and Skills Development, Barrie Regional Office, Apprenticeship OfficeBarrie
Ontario. Ministry of Labour, Immigration, Training and Skills Development, Employment Ontario Contact CentreToronto
Ontario. Ministry of Labour, Immigration, Training and Skills Development. Employment Practices BranchToronto
Ontario. Ministry of Labour, Immigration, Training and Skills Development. Employment Practices Branch, Central Region West, Newmarket, Ontario. Ministry of Labour, Immigration, Training and Skills Development. Employment Practices Branch, Central Region West, NewmarketNewmarket
Ontario. Ministry of Municipal Affairs and Housing. Rental Housing Enforcement UnitToronto
Ontario. Ministry of the Attorney General, Barrie Courthouse - 5th Floor, Crown AttorneyBarrie
Ontario. Ministry of the Attorney General, Barrie Courthouse - 5th Floor, Justice of the Peace - Criminal MattersBarrie
Ontario. Ministry of the Attorney General, Barrie Courthouse - 5th Floor, Victim / Witness Assistance ProgramBarrie
Ontario. Ministry of the Attorney General, Barrie Courthouse - Office 301, Enforcement and Finance - Sheriff's OfficeBarrie
Ontario. Ministry of the Attorney General, Barrie Courthouse - Office 301, Estates AdministrationBarrie
Ontario. Ministry of the Attorney General, Barrie Courthouse - Office 301, Jury LineBarrie
Ontario. Ministry of the Attorney General, Barrie Courthouse - Office 301, Superior Court of Justice - Civil Filing OfficeBarrie
Ontario. Ministry of the Attorney General, Barrie Courthouse - Office 301, Superior Court of Justice - Family CourtBarrie
Ontario. Ministry of the Attorney General, Barrie Courthouse - Office 301, Superior Court of Justice - Small Claims CourtBarrie
Ontario. Ministry of the Attorney General, Barrie Courthouse - Room 303, Family Law Information CentreBarrie
Ontario. Ministry of the Attorney General, Barrie Courthouse - Room 313, Manager of Court Operations OfficeBarrie
Ontario. Ministry of the Attorney General, Barrie Courthouse - Room 412, Superior Court of Justice - Trial Coordinators OfficeBarrie
Ontario. Ministry of the Attorney General, Barrie Courthouse - Room 501, Ontario Court of Justice - Criminal CourtBarrie
Ontario. Ministry of the Attorney General, Toronto, Office for Victims of CrimeToronto Downtown
Ontario. Ministry of the Attorney General. Justice Ontario, TorontoToronto
Ontario. Ministry of the Attorney General. Office of the Public Guardian and TrusteeToronto
Ontario. Ministry of the Solicitor General, Alliston Office, Probation and Parole Services, Alliston OfficeNew Tecumseth
Ontario. Ministry of the Solicitor General, Penetanguishene, Central North Correctional CentrePenetanguishene
Ontario. Ministry of Tourism, Culture and Sport, Barrie, Ontario Travel Information CentreBarrie
Ontario. Ministry of Tourism, Culture and Sport, Midhurst Office, Grants Administration and Community DevelopmentSpringwater
Ontario. Ministry of Tourism, Culture and Sport, Midhurst Office, Tourism Regional OfficeSpringwater
Ontario. Ministry of Transportation, Barrie - Commerce Park Dr, Central Region - International Registration PlanBarrie
Open Arms Early Childhood Centre, Barrie, Child Care ProgramBarrie
Operation Christmas Child, Simcoe WestBarrie
Operation Ukrainian Safe Haven 
OPP ChorusBarrie
Orillia Soldiers' Memorial Hospital, Children's Therapy Services, Orillia - 170 Colborne St WOrillia
Orillia Soldiers' Memorial Hospital, North Simcoe Muskoka Regional Genetics Program, Orillia - 170 Colborne St WOrillia
Orillia Soldiers' Memorial Hospital, Regional Domestic Violence Treatment Centre, Orillia - 170 Colborne St WOrillia
Orillia Soldiers' Memorial Hospital, Sexual Assault Treatment Centre, Orillia - 170 Colborne St WOrillia
Orillia Soldiers' Memorial Hospital, Speech Language Pathology, Orillia - 170 Colborne St WOrillia
Oro-Medonte Township, Oro-Medonte - Line 7 S, Municipal OfficeOro-Medonte
Our Town Food BankTottenham
Ovarian Cancer CanadaToronto Downtown
Overall Independence, Mailing AddressBarrie
Overeaters Anonymous, Mailing Address, Central Ontario Intergroup 
Oxford College, Bayfield MallBarrie