| Aces of Harmony Chorus | Peterborough |
| Achill Choral Society, Caledon | Caledon (Town of) |
| Angus Horticultural Society | Essa |
| Antique and Classic Car Club of Canada, Port Hope - Mailing Address, Great Pine Ridge Region | Cobourg |
| Antique and Classic Car Club of Canada. Nottawasaga Region | Collingwood |
| Apple Country Garden Club | Cramahe |
| Askennonia Senior Centre | Midland |
| Auburn Horticultural Society, Auburn Memorial Hall | Central Huron |
| Barrie - Allandale Railway Modellers | Barrie |
| Barrie Amateur Radio Club | Barrie |
| Barrie Antique Radio Club | Barrie |
| Barrie Concert Band | Barrie |
| Barrie District Stamp Club | Barrie |
| Barrie Garden Club | Barrie |
| Barrie Kennel and Obedience Club, Mailing Address | Barrie |
| Barrie Pipes and Drums | Barrie |
| Barrie Region Aquarium Society of Simcoe | Barrie |
| Barrie Soundwaves, No Physical Address | Barrie |
| Barrie Thornton Fiddle Club | Essa |
| Barrie Writers' Club | Barrie |
| Bayfield Garden Club | Bluewater |
| Baysville Horticultural Society | Lake of Bays Township |
| Beaver Valley Concert Band | Collingwood |
| Beeton Horticultural Society | New Tecumseth |
| Beinn Gorm Highlanders Pipes and Drums | Clearview (Simcoe County) |
| BlueSky Bluegrass Club | Simcoe |
| Bluewater Astronomical Society | South Bruce Peninsula |
| Bond Head / Bradford Garden Club | Bradford West Gwillimbury |
| Bravado Show Choir | Barrie |
| Brentwood Horticultural Society | Clearview (Simcoe County) |
| Brewshiners of Georgian Bay | Collingwood |
| Brighton and Presqu'ile Railway Association | Brighton (Municipality of) |
| Brighton Book Club | Brighton (Municipality of) |
| Brighton Garden Club | Brighton (Municipality of) |
| Brussels & District Horticultural Society | Huron East |
| Campbellford and District Horticultural Society | Trent Hills |
| Cellar Singers (The) | Orillia |
| Central Ontario Humanists, Barrie - No Physical Address | Barrie |
| Champlain Coin Club | Orillia |
| Christian Sports | Oro-Medonte |
| Clearview Community Theatre Group (The) | Clearview (Simcoe County) |
| Cobourg Horticultural Society | Cobourg |
| Cobourg Stamp Club | Cobourg |
| Collingwood Amateur Radio Club | Collingwood |
| Collingwood Garden Club and Horticultural Society, Collingwood Horticultural Society | Collingwood |
| Comancheros Car Club, No Physical Address | |
| County Chordsmen, Barrie Barbershop Harmony Society | Barrie |
| Creemore Horticultural Society | Clearview (Simcoe County) |
| Edenvale Radio Controlled Aircraft Club | Clearview (Simcoe County) |
| Elmvale and District Horticultural Society, Elmvale-John St, Elmvale District Garden Enthusiasts | Springwater |
| Feline Friends Network, Mailing Address | Stratford |
| Festival Sounds Chorus | Stratford |
| First Presbyterian Church, Burning Bush Theatre, Collingwood | Collingwood |
| Georgian Bay British Car Club | Collingwood |
| Georgian Bay Coin and Stamp Club | Wasaga Beach |
| Georgian Bay Coin and Stamp Club, Midland, Georgian Bay Coin and Stamp Club, Midland | Midland |
| Georgian Bay Symphony | Owen Sound |
| Glowing Hearts Charity, Hillcrest Public School, Simcoe Youth Choir | Barrie |
| Goderich & District Horticultural Society | Goderich |
| Goderich Communities in Bloom | Goderich |
| Goldenaires, Meaford United Church | Meaford |
| Grace United Church, Thornbury | Blue Mountains |
| Grafton Green Thumbs | Grafton |
| Haliburton County Folk Society | Haliburton County |
| Haliburton Highlanders Pipes and Drums | Haliburton |
| Haliburton Highlands Genealogy Group | Minden Hills |
| Harmony North Chorus | Collingwood |
| Hawkestone Singers, Mailing Address | Hawkestone |
| Hensall Horticultural Society, Mailing Address | Bluewater |
| Huntsville Community Choir | Huntsville |
| Huronia Fur and Feather Breeders Association | Oro-Medonte |
| Huronia Harmonizers | Midland |
| Huronia Players, Huronia Players - MCC | Midland |
| Huronia Radio Control Club | Barrie |
| Huronia Rose Society | Barrie |
| Information on the Total Solar Eclipse 2024 | Ontario |
| International Pen Friends | Orillia |
| Japanese Sword Society of Canada | Barrie |
| Joybells Handbell Choir, No Physical Address | Barrie |
| Jubilee Chorale | Orillia |
| Kawartha Ancestral Research Association Inc., KARA | Peterborough |
| Kawartha Stamp Club | Peterborough |
| Kawartha Youth Orchestra, Rubidge St | Peterborough |
| Kempenfelt Community Players | Barrie |
| Kincardine Theatre Guild, Kincardine Centre for the Arts | Kincardine |
| King Edward Choir | Barrie |
| Kirkton Horticultural Society, Kirkton-Woodham Community Centre | West Perth |
| La Jeunesse Youth Orchestra | Port Hope (Municipality of) |
| Lakefield and District Horticultural Society | Lakefield |
| Lakeshore Genealogical Society, Cobourg | Cobourg |
| Lindsay Canadian Club | |
| Lyrica Choir | Barrie |
| Midland Horticultural Society | Midland |
| Minden & District Horticultural Society | Minden Hills |
| Mitchell Legion Concert Band | West Perth |
| Mitchell Pioneer Hobby Association | West Perth |
| Monarchist League Barrie Huronia Branch | |
| Monarchist League of Canada, Peterborough Contact Group | Peterborough |
| Muskoka Field Naturalist Club, Muskoka - No Physical Address | Bracebridge |
| Muskoka Music Mix | Huntsville |
| Muskoka Parry Sound Genealogy Group, Muskoka - No Physical Address | |
| Nature Barrie | Barrie |
| New Tecumseth Singers (The) | New Tecumseth |
| Norland Horticultural Society | Norland |
| Northumberland Chorus, Cobourg - Mailing Address, Sweet Adelines International | Cobourg |
| Northumberland Players | Cobourg |
| Nottawasaga Model Railway | Collingwood |
| Omemee Blooms Garden Club, Omemee and District Horticultural Society | Kawartha Lakes |
| Onstage Performance Group | Barrie |
| Orangeville & District Horticultural Society | Orangeville |
| Oriana Singers of Northumberland | Cobourg |
| Orillia Aero Modelers | Gravenhurst |
| Orillia Amateur Radio Club (The), Rotary Place | Orillia |
| Orillia Concert Band | Orillia |
| Orillia Horticultural Society | Orillia |
| Orillia Silver Band | Orillia |
| Orillia Vocal Ensemble | Orillia |
| Orillia's Little Big Band | Orillia |
| Oro-Medonte Horticultural Society | Oro-Medonte |
| Painswick Horticultural Society | Barrie |
| Parkview Singers | Barrie |
| Penetanguishene Garden Club, Penetanguishene Memorial Arena, meetings only. | Penetanguishene |
| Perth County Players, No Physical Address | Stratford |
| Peterborough Amateur Radio Club | Peterborough |
| Peterborough and Area Master Gardeners, Peterborough - No Physical Location | Peterborough |
| Peterborough Astronomical Association | Peterborough |
| Peterborough Concert Band, Peterborough - Mailing Address | Peterborough |
| Peterborough Horticultural Society | Peterborough |
| Peterborough Motor Sports Club, Peterborough - Mailing Address | Peterborough |
| Peterborough New Horizons Bands | Peterborough |
| Peterborough Singers | Peterborough |
| Peterborough Symphony Orchestra | Peterborough |
| Peterborough Theatre Guild | Peterborough |
| Pine Ridge Radio Controlled Model Flying Club Inc | Roseneath |
| Pine Ridge Retriever Club, Brighton - Mailing Address | Brighton (Municipality of) |
| Port Hope Garden Club | Port Hope (Municipality of) |
| Prime Time Club | Wasaga Beach |
| Ripley and District Horticultural Society | Huron-Kinloss |
| Seaforth & District Horticultural Society | Huron East |
| Seaforth Harmony Kings | Huron East |
| Simcoe County Band | Barrie |
| Simcoe Scale Modelers, Barrie - No Physical Address | Barrie |
| Simcoe Singers, Mailing Address | Barrie |
| Society for the Preservation and Encouragement of Barbershop Quartet Singing In America, A Cappella Quinte | Quinte West |
| SONG | Cobourg |
| Sound Investment Community Choir | Collingwood |
| South Simcoe Theatre (The), Cookstown Town Hall | Innisfil |
| St Marys Community Players | St Marys |
| St Marys Horticultural Society, St Marys Legion Hall | St Marys |
| St.James Players, St James Players | Peterborough |
| Stayner Horticultural Society | Clearview (Simcoe County) |
| Stonetown Model Railroad Association | St Marys |
| Stratford & District Horticultural Society | Stratford |
| Stratford and Area Master Gardeners, No Physical Address | Stratford |
| Stratford Astronomy Group | Stratford |
| Stratford Coin Club | Stratford |
| Stratford Concert Band, Mailing Address | Stratford |
| Stratford Concert Choir Association Inc., Stratford Concert Choir | Stratford |
| Stratford Model Club | Perth South |
| Stratford Police Pipes and Drums | Stratford |
| Stratford Public Library, Good Book Group | Stratford |
| Stratford Public Library, Summer Programs | Stratford |
| Sweet Adelines International, Kawartha Music Company Chorus | Peterborough |
| Sweet Adelines International, Orangeville Show Chorus | Orangeville |
| Thornbury Community Theatre | Blue Mountains |
| Ukuladies | Barrie |
| Vocal Maturity Barbershop Singers | Barrie |
| Vox Huronia Community Choir, Vox Huronia Chamber Choir | Midland |
| Wasaga Beach Corvette Club | Wasaga Beach |
| Wasaga Beach Cruisers | Wasaga Beach |
| Wasaga Beach Garden Club | Wasaga Beach |
| Wasaga Beach Public Library, Friday Afternoon Book Club | Wasaga Beach |
| Wasaga Community Theatre | Wasaga Beach |
| Wasaga Writers Club | Wasaga Beach |
| Wingham and District Horticultural Society | North Huron |
| Wye Marsh Wildflower Gardeners, Wye Marsh | Midland |