For regional meetings, conferences, workshops or symposia, the 37 districts of OSSTF/FEESO are divided into five broad geographic regions.

Region 1

• District 5A, Northern Shield
• District 5B, Rainy River
• District 6A, Thunder Bay
• District 6B, Superior North

Region 2

• District 1, Ontario North East
• District 2, Algoma
• District 3, Rainbow
• District 4, Near North
• District 31, Franco-Nord Ontarien
• District 35, Algoma University

Region 3

• District 7, Bluewater
• District 8, Avon Maitland
• District 9, Greater Essex
• District 10, Lambton Kent
• District 11, Thames Valley
• District 18, Upper Grand
• District 23, Grand Erie
• District 24, Waterloo
• District 35, University of Guelph
• District 35, Wilfrid Laurier University

Region 4

• District 12, Toronto
• District 13, Durham
• District 16, York Region
• District 17, Simcoe
• District 19, Peel
• District 20, Halton
• District 21, Hamilton-Wentworth
• District 22, Niagara
• District 30, PSAT
• District 32, Centre-Sud-Ouest
• District 34, Independent Educational Programs
• District 35, Brock University

Region 5

• District 14, Kawartha Pine Ridge
• District 15, Trillium Lakelands
• District 25, Ottawa-Carleton
• District 26, Upper Canada
• District 27, Limestone
• District 28, Renfrew
• District 29, Hastings-Prince Edward
• District 33, District de l’Est
• District 35, Saint Paul University
• District 35, University of Ottawa