| Acton Horticultural Society | Acton |
| Bronte Horticultural Society | Oakville |
| Burlington Amateur Radio Club | Burlington |
| Burlington Community Robotics | Burlington |
| Burlington Horticultural Society | Burlington |
| Burlington Kennel and Obedience Club | Burlington |
| Burlington Model Railway Club | Burlington |
| Burlington Radio Control Modelers | Burlington |
| Burlington Stamp Club | Burlington |
| Burlington Wine Guild | Burlington |
| Canadian Association for Girls in Science, Oakville Chapter - Mailing Address | Oakville |
| Georgetown Horticultural Society | Georgetown |
| Halton Amateur Radio Club | Georgetown |
| Halton Hills Model Flying Club | Georgetown |
| Halton North Peel Naturalist Club | Georgetown |
| Halton Sportsmen's Association | Milton |
| Hamilton and Burlington Rose Society | Burlington |
| Historical Automobile Society of Canada | Oakville |
| Mi3L School, Robotics and STEM Programs | Oakville |
| Milton & District Horticultural Society | Milton |
| Oakville & District Kennel Club | Oakville |
| Oakville (Milton) Model Flying Club | Milton |
| Oakville Community FIRST Robotics Team, Orbit Robotics | Oakville |
| Oakville Horticultural Society | Oakville |
| Oakville React | Oakville |
| South Halton Amateur Radio Emergency Service Group | Milton |
| South Peel Naturalists' Club | Mississauga |
| T. B. Radio Communications | Burlington |
| The Friends of the Old Seed House Garden, Showcase Garden | Georgetown |
