Opeongo High School is a secondary school in Renfrew County, Ontario, Canada, that serves the townships of Whitewater Region, Laurentian Valley, Admaston Bromley, Sebastapol, Bonnechere Valley, and North Algona-Wilberforce.

It was built in 1968, at a cost of $3.6 million, to accommodate a growing population of students and a change in educational trends.

Its colours are green and gold, and its mascot is the Wildcat.

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