| Banbury Cross Housing Co-operative | Stratford |
| Bard of Avon Housing Co-operative | Stratford |
| Basketeers, Stratford Chapter | Stratford |
| Beaver Creek Institution | Gravenhurst |
| Beef Farmers of Ontario, No Physical Address - Perth County | |
| Beta Sigma Phi, Stratford | Stratford |
| Betamarsh Incorporated | Goderich |
| Bethel Christian Reformed Church | North Perth |
| Bethel Pentecostal Church, Bethel Kids | Stratford |
| Bethel Pentecostal Church | Stratford |
| Bethel Pentecostal Church, Heavenly Hoops Basketball | Stratford |
| Bethel Pentecostal Church, Student Ministries | Stratford |
| Better Ways for Seniors Ltd., Mobile Service | St Marys |
| Big Brothers Big Sisters of Listowel & District | North Perth |
| Big Brothers Big Sisters of Listowel & District, Couples for Kids | North Perth |
| Big Brothers Big Sisters of Listowel & District, Group Mentor Program | North Perth |
| Big Brothers Big Sisters of Listowel & District, In-School Mentor Program | North Perth |
| Black Creek Mobile Veterinary Services | |
| Black Youth Helpline | Toronto |
| Blue Heron Taxi and Delivery | West Perth |
| Blyth Brussels Minor Hockey Association | Huron East |
| Brain Injury Association of London and Region - Perth Huron, Avondale United Church, Perth County Social Leisure Group | Stratford |
| Brain Injury Association of London and Region - Perth Huron, Local Community Food Centre, Perth County Support Group | Stratford |
| BRIA Mental Healthcare, Online | Toronto |
| Brightshores Health System, Owen Sound Hospital | Owen Sound |
| Brocksden Country School Museum | Perth East |
| Bruce Power Visitors' Centre | Tiverton |
| Bullying Canada | Brampton |
| By Peaceful Waters, Listowel Office | Listowel |
| By Peaceful Waters, Stratford Office | Stratford |