| Abbey Oaks Slo Pitch, Men's Slo Pitch League | Oakville |
| Aldershot Community Recreation Association | Burlington |
| Brookville Masters Slo Pitch League | Milton |
| Burlington Amateur Softball Association | Burlington |
| Burlington Amateur Sports Leagues | Burlington |
| Georgetown Slopitch League | Georgetown |
| Glen Abbey Ladies Slo Pitch League | Oakville |
| Glen Abbey Slo-Pitch League | Oakville |
| Halton Hills Men's Slopitch League | Georgetown |
| Halton Hills. Recreation & Parks, Sports Fields | Halton Hills |
| Milton Girls Softball | Milton |
| Milton Ladies Slo Pitch, Recreational Baseball League | Milton |
| Milton Ladies Softball League | Milton |
| Milton Old Friends League, Over 50 Slo-Pitch League | Milton |
| Oakville Girls Softball Association | Oakville |
| Oakville Masters Mens Slo-Pitch League | Oakville |
| Slo-Pitch Ontario Association | St Catharines |
| Slow Pitch Softball Leagues, Burlington | Burlington |
