| | Organization Name(s) | Located In |
 | Yat San Chinese School | Markham |
| | YDAMA | York Region |
| Yee Hong Centre for Geriatric Care, Markham Centre | Markham |
| Yee Hong Community Wellness Foundation | Scarborough |
| Yellow Brick House | Richmond Hill |
| YMCA, Markham YMCA Rudy Bratty Centre | Markham |
| YMCA Employment Assessment Centre | Richmond Hill |
| YMCA Markham Business Centre, Markham Unit | Markham |
| YMCA of Greater Toronto | Toronto |
| YMCA Ontario Early Years Centre, Oak Ridges Riding | Richmond Hill |
| | Yonge Aurora Mixed Slo-Pitch League | Aurora |
| | York Singles Social Club | Richmond Hill |
| York Catholic District School Board, Administrative Offices | Aurora |
| York Catholic District School Board, Adult and Continuing Education | Aurora |
| York Catholic District School Board, Adult ESL Centre | Richmond Hill |
| York Catholic District School Board, All Saints Catholic Elementary School | Markham |
| York Catholic District School Board, Blessed John XXIII Catholic Elementary School | Markham |
| York Catholic District School Board, Cardinal Carter Catholic High School | Aurora |
| York Catholic District School Board, Crisis Intervention | Aurora |
| York Catholic District School Board, Directory of Schools | Aurora |
| York Catholic District School Board, English As A Second Language | Markham |
| York Catholic District School Board, Father Michael McGivney Catholic Academy | Markham |
| York Catholic District School Board, Holy Spirit Catholic Elementary School | Aurora |
| York Catholic District School Board, Jean Vanier Catholic High School | Richmond Hill |
| York Catholic District School Board, Kateri Tekakwitha Catholic Elementary School | Markham |
| York Catholic District School Board, Mother Teresa Catholic Elementary School | Markham |
| York Catholic District School Board, Our Lady of the Annunciation Elementary School | Richmond Hill |
| York Catholic District School Board, San Lorenzo Ruiz Catholic Elementary School | Markham |
| York Catholic District School Board, Sir Richard W Scott Catholic Elementary School | Markham |
| York Catholic District School Board, St Anthony Catholic Elementary School | Thornhill |
| York Catholic District School Board, St Augustine Catholic High School | Markham |
| York Catholic District School Board, St Benedict Catholic Elementary School | Markham |
| York Catholic District School Board, St Brigid Catholic Elementary School | Stouffville |
| York Catholic District School Board, St Edward Catholic Elementary School | Markham |
| York Catholic District School Board, St Francis Xavier School | Markham |
| York Catholic District School Board, St Joseph Catholic Elementary School, Aurora | Aurora |
| York Catholic District School Board, St Joseph Catholic Elementary School, Markham | Markham |
| York Catholic District School Board, St Julia Billiart Catholic Elementary School | Markham |
| York Catholic District School Board, St Justin Martyr Catholic Elementary School | Markham |
| York Catholic District School Board, St Mark Catholic Elementary School | Stouffville |
| York Catholic District School Board, St Matthew Catholic Elementary School | Markham |
| York Catholic District School Board, St Michael Catholic Academy | Thornhill |
| York Catholic District School Board, St Monica Catholic Elementary School | Markham |
| York Catholic District School Board, St Patrick Catholic Elementary School | Markham |
| York Catholic District School Board, St Rene Goupil Catholic Elementary School/St. Luke Catholic Elementary School | Thornhill |
| York Catholic District School Board, St Robert Catholic High School | Thornhill |
| York Catholic District School Board, St Vincent de Paul Catholic Elementary School | Markham |
| York Catholic District School Board, St. Brendan CES | Stouffville |
| York Catholic District School Board, St. Brother Andre Catholic High School | Markham |
| York Catholic District School Board, St. Joan of Arc Catholic High School | Maple |
| York Catholic District School Board, St. Maximilian Kolbe Catholic High School | Aurora |
| York Catholic District School Board Trustee, Carol Cotton, Markham Area 1: Wards 1,2,3,6, Markham | Aurora |
| York Catholic District School Board Trustee, Marlene Mogado, Area 2 - Wards 4,5,7,8, Markham | Aurora |
| | York Central Ball Hockey League | York Region |
| York Central Hospital | Richmond Hill |
| York Central Hospital, Continuing Care Program | Richmond Hill |
| York Central Hospital, Mental Health Program | Vaughan |
| York Central Hospital, Mental Health Program, York-Simcoe Brain Injury Services | Richmond Hill |
| York Central Hospital, Upper Thornhill Centre, York Region Domestic Abuse & Sexual Assault Care Resource Centre | Vaughan |
| York Central Hospital, Woman and Child Program, Childbirth Education Classes | Richmond Hill |
| York Central Hospital, Woman and Child Program, Genetics Clinic | Richmond Hill |
| York Centre for Children Youth and Families (The) | Richmond Hill |
| | York Chamber Ensemble | Aurora |
| York County Bowmen | York Region |
| York Durham Academy of the Performing Arts | Stouffville |
| York Durham Academy of the Performing Arts The Academy Children's Choir | Stouffville |
| York Farmers Market | Thornhill |
| | York Floorball League | Newmarket |
| York Highlands Chorus | Sharon |
| York Inline Hockey League | Richmond Hill |
| York Med Xray Clinic | Richmond Hill |
| York Medical, Aurora | Aurora |
| York Medical Walk In Clinic | Richmond Hill |
| York North Family Resource Programmes - The Family Place | Mount Albert |
| York Outreach | Markham |
| York Paediatric Therapy Services | Richmond Hill |
| York Pioneer and Historical Society, Sharon Temple, King Township Historical Society | Toronto |
| York Pride Fest | York Region |
| York Professional Care and Education Inc, Aurora Grove Kids' Club | Aurora |
| York Professional Care and Education Inc, Lester B Pearson Children's Academy and Kids' Club | Aurora |
| York Professional Care and Education Inc, Licensed Home Care | Aurora |
| York Professional Care and Education Inc, Northern Lights Kids' Club | Aurora |
| York Professional Care and Education Inc, Regency Acres Kids' Club | Aurora |
| York Professional Care and Education Inc., St. Josephs Kid's Club | Aurora |
| York Region, McCleary Court Community Environmental Centre | Vaughan |
| York Region Abuse Program | Newmarket |
| | York Region Alliance To End Homelessness | Newmarket |
| | York Region Anti-Bullying Coalition | York Region |
| York Region Archaeological Management Plan | Newmarket |
| York Region Arts Council | Aurora |
| York Region Association for Recreation for the Disabled | Richmond Hill |
| York Region Association for Volunteer Administration | York Region |
| York Region Child Seat Safety Coalition, St. John's Ambulance | Richmond Hill |
| | York Region Community and Health Services - Falls Prevention, Health Connection | York Region |
| York Region Community Foundation | Markham |
| York Region Conservatory of Music | Richmond Hill |
| York Region District School Board, Administrative Offices | Aurora |
| York Region District School Board, Aldergrove Public School | Markham |
| York Region District School Board, Alexander Muir Public School | Newmarket |
| York Region District School Board, Alternate Education Program, Markham Alternate Program, East - Markham District High School | Markham |
| York Region District School Board, Armadale Public School | Markham |
| York Region District School Board, Ashton Meadows Public School | Markham |
| York Region District School Board, Aurora High School | Aurora |
| York Region District School Board, Ballantrae Public School | Stouffville |
| York Region District School Board, Baythorn Public School | Thornhill |
| York Region District School Board, Bayview Fairways Public School | Thornhill |
| York Region District School Board, Bayview Glen Public School | Thornhill |
| York Region District School Board, Bill Crothers Secondary School | Markham |
| York Region District School Board, Black Walnut Public School | Markham |
| York Region District School Board, Bogart Public School | Newmarket |
| York Region District School Board, Boxwood Public School | Markham |
| York Region District School Board, Bur Oak Secondary School | Markham |
| York Region District School Board, Buttonville Public School | Markham |
| York Region District School Board, Castlemore Public School | Markham |
| York Region District School Board, Cedarwood Public School | Markham |
| York Region District School Board, Central Park Public School | Markham |
| York Region District School Board, Coledale Public School | Markham |
| York Region District School Board, Community and International Education Services, Dr. Bette Stephenson Centre for Learning | Richmond Hill |
| York Region District School Board, Community Education Centre - Central, Secondary Education Centre | Richmond Hill |
| York Region District School Board, Community Education Centre - East | Markham |
| York Region District School Board, Community Education Centre - West | Thornhill |
| York Region District School Board, Continuing Education, Adult Literacy and Basic Skills, Richmond Hill | Richmond Hill |
| | York Region District School Board, Continuing Education, Citizenship Classes, Richmond Hill | Richmond Hill |
| York Region District School Board, Coppard Glen Public School | Markham |
| York Region District School Board, Cornell Village Public School | Markham |
| York Region District School Board, David Suzuki Public School | Markham |
| York Region District School Board, Directory of Schools | Aurora |
| York Region District School Board, Donald Cousens Elementary School | Markham |
| York Region District School Board, Dr G W Williams Secondary School | Aurora |
| York Region District School Board, Dr. Bette Stephenson Centre for Learning, Adult Co-Operation Education Program | Richmond Hill |
| York Region District School Board, Dr. Roberta Bondar Public School | Vaughan |
| York Region District School Board, E J Sand Public School | Thornhill |
| York Region District School Board, Edward T Crowle Public School | Markham |
| York Region District School Board, Ellen Fairclough Public School | Markham |
| York Region District School Board, ESL | Thornhill |
| York Region District School Board, ESL/ELD Reception Centre | Markham |
| York Region District School Board, Food For Learning | Newmarket |
| York Region District School Board, Franklin Street Public School | Markham |
| York Region District School Board, German Mills Public School | Thornhill |
| York Region District School Board, Glad Park Public School | Stouffville |
| York Region District School Board, Greensborough Public School | Markham |
| York Region District School Board, Harry Bowes Public School | Stouffville |
| York Region District School Board, Henderson Avenue Public School | Thornhill |
| York Region District School Board, Herbert H. Carnegie Public School | Vaughan |
| York Region District School Board, Highgate Public School | Markham |
| | York Region District School Board, International Languages | York Region |
| York Region District School Board, James Robinson Public School | Markham |
| York Region District School Board, John McCrea Public School | Markham |
| York Region District School Board, Johnsview Village Public School | Thornhill |
| York Region District School Board, Legacy Public School | Markham |
| York Region District School Board, Lester B Pearson Public School | Aurora |
| York Region District School Board, Lincoln Alexander Public School | Markham |
| York Region District School Board, Little Rouge Public School | Markham |
| York Region District School Board, Markham District High School | Markham |
| York Region District School Board, Markham Gateway Public School | Markham |
| York Region District School Board, Markville Secondary School | Markham |
| York Region District School Board, Mazo de la Roche Public School | Newmarket |
| York Region District School Board, Middlefield Collegiate Institute | Markham |
| York Region District School Board, Milliken Mills High School | Markham |
| York Region District School Board, Milliken Mills Public School | Markham |
| York Region District School Board, Mount Joy Public School | Markham |
| York Region District School Board, Newmarket High School | Newmarket |
| York Region District School Board, Oscar Peterson Public School | Stouffville |
| York Region District School Board, Parkland Public School | Markham |
| York Region District School Board, Parkview Public School | Markham |
| York Region District School Board, Pierre Elliott Trudeau High School | Markham |
| York Region District School Board, Poplar Bank Public School | Newmarket |
| York Region District School Board, Ramer Wood Public School | Markham |
| York Region District School Board, Randall Public School | Markham |
| York Region District School Board, Reesor Park Public School | Markham |
| York Region District School Board, Roy H Crosby Public School | Markham |
| York Region District School Board, Sam Chapman Public School | Markham |
| York Region District School Board, Sir John A. Macdonald Public School | Markham |
| York Region District School Board, Sir Wilfred Laurier Public School | Markham |
| York Region District School Board, Stonebridge Public School | Markham |
| York Region District School Board, Stornoway Crescent Public School | Thornhill |
| York Region District School Board, Stouffville District Secondary School | Stouffville |
| York Region District School Board, Summitview Public School | Stouffville |
| York Region District School Board, Thornhill Secondary School | Thornhill |
| York Region District School Board, Thornlea Secondary School | Thornhill |
| | York Region District School Board, Trustee, Ada Yeung, Area 2 - Wards 3 and 6 | Markham |
| | York Region District School Board, Trustee, Allan Tam, Area 3 - Wards 4 and 5 | Markham |
| | York Region District School Board, Trustee, Juanita Nathan, Area 4 - Wards 7 and 8 | Markham |
| York Region District School Board, Trustee, Susan Geller, Area 1 - Wards 1 and 2 | Thornhill |
| York Region District School Board, Unionville High School | Markham |
| York Region District School Board, Unionville High School, Arts York | Unionville |
| York Region District School Board, Unionville Meadows Public School | Markham |
| York Region District School Board, Unionville Public School | Markham |
| York Region District School Board, Uplands Adult Community Learning Centre, Adult ESL | Thornhill |
| York Region District School Board, Virtual Schooling, Aurora | Aurora |
| York Region District School Board, Virtual Schooling, Richmond Hill | Richmond Hill |
| York Region District School Board, Wendat Village Public School | Stouffville |
| York Region District School Board, Wilclay Public School | Markham |
| York Region District School Board, William Armstrong Public School | Markham |
| York Region District School Board, William Berczy Public School | Markham |
| York Region District School Board, Willowbrook Public School | Thornhill |
| York Region District School Board, Wismer Public School | Markham |
| York Region District School Board, Woodland Public School | Thornhill |
| | York Region District School Board, York Works | |
| York Region District School Board, York Works | York Region |
| York Region District School Board, yorkworks | Stouffville |
| York Region Environmental Alliance | York Region |
| York Region FM Wellness Group | Richmond Hill |
| York Region Food for Learning | Newmarket |
| York Region Food Network | Aurora |
| York Region Head Injury Support Group & Bike Helmet Coalition | Richmond Hill |
| | York Region Immigration Portal | Newmarket |
| York Region Knitting Guild | Aurora |
| York Region Land Registry Office, York Region #65 | Aurora |
| York Region Law Association, York Region Court House, Law Association Library | Newmarket |
| York Region Learning Connections | Richmond Hill |
| York Region Medical Venturers | Newmarket |
| | York Region Mens Slo Pitch | Richmond Hill |
| York Region Natural Heritage and Forestry Services | Newmarket |
| York Region Neighbourhood Services, Boys & Girls Club of York Region | Newmarket |
| York Region Olympic Club | Stouffville |
| York Region Raw Food Meetup Group | Holland Landing |
| York Region Skating Academy, Y.R.S.A. | Richmond Hill |
| York Region Sleep Disorders Centre | Richmond Hill |
| York Region Soccer Association | Concord |
| | York Region Sport & Social Club | York Region |
| York Region Violence Against Women Coordinating Committee | Newmarket |
| York Region Yard Waste Drop-off, Miller Waste Systems, The Bloomington Compost facility | Richmond Hill |
| York Regional Police, Community Resource Centre, South Customer Service Unit | Richmond Hill |
| York Regional Police, Disctrict Two Headquarters, Road Watch | Richmond Hill |
| York Regional Police, District Five Headquarters, Markham | Markham |
| York Regional Police, District Four Headquarters, Vaughan | Vaughan |
| York Regional Police, District One Headquarters | Newmarket |
| York Regional Police, District Two Headquarters, Richmond Hill | Richmond Hill |
| York Regional Police, Elder Abuse Services | Newmarket |
| | York Regional Police, Hate Crimes Unit | Newmarket |
| York Regional Police, Stouffville Community Policing Centre | Stouffville |
| York Regional Police Customer Service | Aurora |
| | York Regional Police Male Chorus | Newmarket |
| | York Rhythmic Gymnastics Club | Markham |
| | York Singles Club | Richmond Hill |
| York Support Services Network - Markham & Newmarket Locations | Markham |
| York Symphony Orchestra | Richmond Hill |
| York Synchronized Swim Club | Richmond Hill |
| York University | Toronto |
| | York University - Student Peer Support Centre | Toronto |
| York University Osgoode Hall Law School, Community and Legal Aid Services Program | North York |
| York. Community and Health Services Department, Housing York Inc | Newmarket |
| York. Regional Municipality of, Business, York Small Business Enterprise Centre | Newmarket |
| York. Regional Municipality Of, Community and Health Services, Early Intervention Services, East Office | Markham |
| York. Regional Municipality Of, Community and Health Services Department, Long Term Care and Seniors Branch, Alternative Community Living Program | Aurora |
| York. Regional Municipality Of, Community and Health Services Department, Long Term Care and Seniors Branch, Alternative Community Living Program | Richmond Hill |
| York. Regional Municipality Of, Community and Health Services Department, Public Health Services | Newmarket |
| York. Regional Municipality of, Community and Health Services Department, Social Assistance, Ontario Works | Georgina |
| York. Regional Municipality Of, Community Services and Housing, Charles Darrow Cooperative | Aurora |
| York. Regional Municipality Of, Community Services and Housing, Oakwill Apartments | Richmond Hill |
| | York. Regional Municipality Of, Community Services and Housing Department, Dunlop Apartments | Richmond Hill |
| | York. Regional Municipality Of, Community Services and Housing Department, Family and Children's Services, Parenting and Children's Programs, AOK EARLY CHILD DEVELOPMENT AND PARENTING PROGRAMS | Newmarket |
| | York. Regional Municipality Of, Community Services and Housing Department, Family and Children's Services, Preschool Speech and Language Program | York Region |
| York. Regional Municipality Of, Community Services and Housing Department, Housing and Residential Services, Social Housing, Housing York Inc | Newmarket |
| York. Regional Municipality Of, Community Services and Housing Department, Housing and Residential Services Division | Newmarket |
| York. Regional Municipality Of, Community Services and Housing Department, Housing York | Newmarket |
| York. Regional Municipality Of, Community Services and Housing Department, Jubilee Gardens | Richmond Hill |
| York. Regional Municipality Of, Community Services and Housing Department, Legion Wood Apartments | Woodbridge |
| York. Regional Municipality Of, Community Services and Housing Department, Social Assistance, Ontario Works, Richmond Hill | Richmond Hill |
| York. Regional Municipality Of, Community Services and Housing Department, Social Assistance, Ontario Works, Vaughan | Vaughan |
| York. Regional Municipality of, Community Services and Housing Department, Family and Childrens Services Division, Kids Line | York Region |
| York. Regional Municipality Of, Corporate Services Department, Court Administration, Provincial Offences Office, Ontario Court of Justice, RICHMOND HILL COURT (4961) | Richmond Hill |
| | York. Regional Municipality Of, Emergency Medical Services | Newmarket |
| York. Regional Municipality Of, Emergency Medical Services, Ambulance Services, Markham, Milliken and Unionville | Sharon |
| | York. Regional Municipality Of, Environmental Services Department, Household Hazardouse Waste Depot, Markham Household Hazardous Waste Depot | Markham |
| York. Regional Municipality Of, Health Services Department, Health Connection, Richmond Hill Office | Richmond Hill |
| York. Regional Municipality Of, Health Services Department, Public Health and Safety Branch, Markham Office | Markham |
| | York. Regional Municipality Of, Health Services Department, Public Health and Safety Branch, Public Health Services, Health Connection | York Region |
| York. Regional Municipality Of, Health Services Department, Public Health and Safety Branch, Public Health Services, Infectious Diseases Control Division, Sexual Health Clinics, Markham | Markham |
| York. Regional Municipality Of, Health Services Department, Public Health and Safety Branch, Public Health Services, Infectious Diseases Control Division, Sexual Health Clinics, Richmond Hill | Richmond Hill |
| York. Regional Municipality Of, Planning and Development Services | Newmarket |
| York. Regional Municipality Of, Planning and Development, Economic Development, York Region Export Development Program | Newmarket |
| York. Regional Municipality Of, Transportation and Works Department, Household Waste and Recycling Depot, Vaughan Household Hazardous Waste Depot | Vaughan |
| York. Regional Municipality Of, Transportation and Works Department, York Region Transit | Richmond Hill |
| | York. Regional Municipality Of, Transportation and Works Department, York Region Transit, Mobility Plus | Richmond Hill |
| York. Regional Municipality Of Transportation and Works Department, Long Term Water Project Office, Water for Tomorrow | Newmarket |
| York-Durham Aphasia Centre, March of Dimes | Richmond Hill |
| | York-Durham Heritage Railway | Stouffville |
| Yorkinfo Community Information & Volunteer Centre | York Region |
| York-Simcoe Naturalists | East Gwillimbury |
| | Yorkwelcome.ca - Immigrant Portal | York Region |
| | Young Drivers of Canada. Richmond Hill | Richmond Hill |
| Young Peoples Theatre | Toronto |
| Youth Assisting Youth, York Region | North York |
| Youth Link | Toronto |
| Youthdale York Region | Aurora |
| Youthspeak Performance Charity Organization | Newmarket |
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