The Ottawa Fire Services (OFS; French: Service des incendies d’Ottawa) provides fire protection, technical rescue services, hazardous materials response, and first responder emergency medical assistance to the city of Ottawa, Ontario, Canada.

On Friday September 3, 2010, Chief deHooge announced that a three-year trial testing the use of 24-hour shift rotations would begin in January 2011.

In Canada twelve of the fifteen largest fire departments are using the 24-hour shift rotation.

Currently, City of Ottawa firefighters are issued tan Starfield Lion bunker gear, black leather Haix structural fire boots, and traditional black Cairns 1044 structural firefighting helmets for firefighters, red 1044s for Lieutenants and Captains and white 1044s for Chief Officers.

In 2015, the department phased out their SCBAs (previously the ISI Viking), and replaced them with the MSA Firehawk M7XT with Rescue Belt II system and Ultra Elite facepiece.