The Ontario Association of Fire Chiefs represents the chief fire officers of the 437 fire departments in the Province of Ontario. These chief officers are ultimately responsible, by statute, for the management and delivery of fire, rescue, and emergency response to the 15 million residents of Ontario.

The 437 fire departments are divided into 32 career fire departments, 210 composite fire departments and 195 volunteer fire departments. There are 30,716 firefighters in Ontario including 18,281 volunteer firefighters, 11,971 career firefighters, and 464 part-time firefighters.