| Alpine Ontario, Collingwood, Southern Ontario Division | Collingwood |
| Barrie and District Association of Basketball Officials | Barrie |
| Beaver Valley Athletic Association | Blue Mountains |
| Blyth Brussels Minor Hockey Association | Huron East |
| East Central Ontario Soccer Association, Peterborough - Rink St | Peterborough |
| Elgin Middlesex District Soccer League, Wingham Minor Soccer Association | North Huron |
| Georgian Bay Football Officials Association | Barrie |
| Goderich Minor Baseball Association | Goderich |
| Goderich Ringette Association | Goderich |
| Grand Bend Lakers Minor Baseball Association, No Physical Address | Lambton Shores |
| Howick Hornets Athletic Association, Howick Athletic Association | Howick |
| Listowel Minor Baseball Association | North Perth |
| Listowel Minor Hockey Association | North Perth |
| Minor Hockey Alliance of Ontario | Stratford |
| Mitchell Minor Sports | West Perth |
| Penninsula Adventure Sports Association | Georgian Bluffs |
| Sebringville Athletic Association | Perth East |
| Shakespeare & Community Athletic Association, Mailing Address | Perth East |
| Special Olympics Ontario - Central Ontario | Ontario |
| St Marys Minor Ball Association, Mailing Address | St Marys |
| Stratford Basketball Association, Mailing Address Only | Stratford |
| Stratford Minor Baseball Association | Stratford |
| Stratford Minor Girls Hockey Association, Mailing Address Only | Stratford |
| Stratford Minor Hockey Association, Mailing Address Only | Stratford |
| Western Ontario Athletic Association | North Huron |
| Wingham Minor Hockey Association | North Huron |
| Zurich Minor Athletic Association | Bluewater |