• Organizations based in Ontario by city(14 C)

C

• Companies based in Ontario(33 C, 87 P)

E

• Educational organizations based in Ontario(1 C, 56 P)
• Environmental organizations based in Ontario(1 C, 48 P)

F

• Franco-Ontarian organizations(1 C, 18 P)

G

• Gangs in Ontario(3 C, 21 P)

H

• History organizations based in Ontario(3 C, 1 P)

I

• Indigenous organizations in Ontario(1 C, 6 P)

J

• Jewish organizations based in Ontario(1 C, 1 P)

L

• Law enforcement agencies of Ontario(2 C, 41 P)
• Legal organizations based in Ontario(18 P)
• Libraries in Ontario(4 C, 10 P)

M

• Medical and health organizations based in Ontario(1 C, 102 P)
• Museums in Ontario(6 C, 13 P)

N

• Non-profit organizations based in Ontario(3 C, 30 P)

O

• Orchestras from Ontario(2 C, 17 P)

P

• Professional associations based in Ontario(32 P)
• Provincial political parties in Ontario(9 C, 26 P)

S

• Sports clubs and teams in Ontario(17 C, 2 P)
• Sports governing bodies in Ontario(2 C, 15 P)
• Summer camps in Ontario(12 P)

T

• Trade unions in Ontario(1 C, 28 P)
• Trade associations based in Ontario(16 P)
• Transit agencies in Ontario(6 C, 52 P)
• Ontario government tribunals(14 P)

U

• Universities and colleges in Ontario(10 C, 8 P)

0–9

• 49th Field Artillery Regiment, RCA
• 118th (North Waterloo) Battalion, CEF
• 176th Battalion (Niagara Rangers), CEF

A

• Arts Council~Haliburton Highlands

C

• Camp Shomria
• Canadian Children's Rights Council
• Canadian Fraternal Association
• Canadian Malayalee Association
• Canadian Welding Bureau
• Cobourg Museum Foundation
• Condo Manager Licensing Authority
• Consensus Ontario

E

• EMAS Canada
• Emmanuel International Canada

F

• Fair Vote Canada
• Forest of Reading

G

• Galeries Ontario / Ontario Galleries
• Great Lakes Gliding Club

H

• Heliconian Club

I

• Inclusion Canada
• International Union of Food Science and Technology

L

• Lake Simcoe Region Conservation Authority

M

• Midwestern Junior C Hockey League
• Anglican Diocese of Moosonee
• Municipal Property Assessment Corporation
• Muskoka Lakes Association

O

• Oakville Yacht Squadron
• Feed Ontario
• Ontario Association of Former Parliamentarians
• Ontario Charitable Gaming Association
• Ontario Coalition Against Poverty
• Ontario Disability Employment Network
• Ontario Gurdwaras Committee
• Ontario Handweavers & Spinners
• Ontario Horticultural Association
• Ontario Landowners Association
• Ontario Motor Vehicle Industry Council
• Ontario Public Interest Research Group
• Ontario Society for the Prevention of Cruelty to Animals
• Ontario Society of Artists
• Ontario Trails Council
• Ontario Visual Heritage Project

P

• Peterborough and District Labour Council
• PolyAnalytik
• Professional Hockey Players' Association

R

• Refugee Education Council
• Ride for Refuge
• Royal Lake of the Woods Yacht Club

S

• St. Catharines Rowing Club
• Scots Fusiliers of Canada
• Scouting and Guiding in Ontario
• Social Housing Services Corporation
• Source Protection Committees
• Stormont, Dundas and Glengarry Highlanders

W

• Wabun Tribal Council
• Wintergreen Studios
• Women's Art Association of Canada
• Wyldewood Surf Club

Y

• Yonge Street Agricultural Society