| | Organization Name(s) | Located In |
 | b current | Greater Toronto Area |
| Babysitters Course (The), Seconds Save Lives, Canadian Red Cross | Markham |
| Bach to Blues Company (The) | Stouffville |
| Baha'i Community of Canada | Thornhill |
| Baha'i Community Organization | Thornhill |
| | Baha'i Faith of Aurora | Aurora |
| Baldwin Pre-School Centre | Aurora |
| | Ballantrae and District Lions Club | Stouffville |
| Bangladesh Awami Society, Ontario Canada | Markham |
| Barrier Free Recorded Information Line | Toronto |
| Barton Retirement Home (The) | Newmarket |
| | Basketeers | York Region |
| Bathurst Glen Golf & Country Club | Richmond Hill |
| Baycrest Centre Geriatric Care | Toronto |
| Bayview Country Club Estates Ratepayers Association | Thornhill |
| Bayview Fairways Ratepayers Association | Thornhill |
| Bayview Glen Church | Thornhill |
| Bayview Glen Day Camp | Thornhill |
| Bayview Glen Residents Association | Thornhill |
| Bayview North Medical Centre, Family Practice & Walk-in Clinic | Aurora |
| Bayview Watercolour Society | Richmond Hill |
| Bayview Woods Medical Centre, Dr. Charles Tan | Richmond Hill |
| Beechwood Cemetery and Mausoleum | Concord |
| Behaviour Management Services of York Region and Simcoe County | Richmond Hill |
| Beit Rayim Synagogue | Richmond Hill |
| Bell Canada | Richmond Hill |
| Bellwood Health Services | Scarborough |
| Berczy Medical Clinic | Markham |
| Bereaved Families of Ontario, York Region | Newmarket |
| Bereavement Support Group | Oak Ridges |
| Bereavement Support Group, St Justin Martyr Parish | Unionville |
| Bernard Betel Centre for Creative Living (The) | North York |
| | Bertha Cane Chapter IODE | Newmarket |
| Best Buddies Canada | Toronto |
| Best Western Parkway Hotel | Richmond Hill |
| | Beta Sigma Phi | Aurora |
| Bethany Christian Living | Unionville |
| Bethel Canadian Reformed Church | Thornhill |
| Bethel Canadian Reformed Church of Toronto | Richmond Hill |
| Bethesda Evangelical Lutheran Church | Unionville |
| Bethesda Lutheran Cemetery | Unionville |
| Better Business Bureau of Mid-Western & Central Ontario Inc. | Kitchener |
| Between Friends, Aboriginal Clothing and Book Drive | Thornhill |
| Big Brothers Big Sisters of York | Aurora |
| | Bingo World | Richmond Hill |
| Black Creek Pioneer Village | Toronto |
| Black Creek Pioneer Village | Toronto |
| Blackmore Tennis Club | Richmond Hill |
| Bloomington Cove Specialty Care | Stouffville |
| Bloomington Gospel Church | Whitchurch-Stouffville |
| | Blue Bridge Festival, The | York Region |
| Blue Cross (Ontario) | Etobicoke |
| | Blue Door Shelters, Leeder Place Family Shelter, Porter Place, Youth Shelter | Newmarket |
| Blue Hills Child and Family Centre | Aurora |
| Blue Willow Garden & Landscape Design Centre, Nursery and Butterflies | Georgina |
| Blueballoon Health Services | Aurora |
| B'nai B'rith Youth Organization | Toronto |
| B'nai Shalom North Congregation | Thornhill |
| Bob Rumball Centre for the Deaf | Toronto |
| Box Grove Community Association | Markham |
| Box Grove Community Centre | Markham |
| Box Grove Tennis Club | Markham |
| | Boyington Heights Ratepayers Association (Inc.) | Markham |
| Boys and Girls Clubs of York Region | Newmarket |
| Bradford Immigrant and Community Services | Bradford |
| Brainchild | Toronto |
| | Breast Screening Centres - York Region, Cancer Care Ontario | Toronto |
| Bridle Trail Baptist Church | Unionville |
| British High Commission, British Consulate-General | Toronto |
| Brookside Court & Hilltop Place Retirement Residences, Revera Inc. | Richmond Hill |
| Brougham Cemetery | Stouffville |
| | Brownridge Ratepayers Association | Concord |
| Brown's Corners United Church | Markham |
| Bruno's Fine Foods, Grocery Home Delivery | Richmond Hill |
| Buckingham Manor Retirement Home | Stouffville |
| Building Blocks Learning Centre | Buttonville |
| | Bully Free Community Alliance of York Region | Newmarket |
| Burd's Family Fishing | Stouffville |
| Burr House Craft Gallery and Tea Room | Richmond Hill |
| Burr House Spinners and Weavers Guild | Richmond Hill |
| | Business Registration | Markham |
| | Business Women's Network Association | York Region |
| BusyFamily Resource Centre, Taking Care | Richmond Hill |
| | Buttonville Cemetery | Markham |
| Buttonville Women's Institute Community Hall | Markham |
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