Peterson Creek is a river in the Lake Ontario and Cataraqui River drainage basins in South Frontenac, Frontenac County and Rideau Lakes, Leeds and Grenville United Counties in eastern Ontario, Canada.

Peterson Creek begins at Upper Peterson Lake in South Frontenac township at an elevation of 147 metres (482 ft) about 4 kilometres (2.5 mi) north of the community of Keelerville.

It then flows southwest, re-enters South Frontenac township, and reaches its mouth at the north centre of Hart Lake at an elevation of 120 metres (394 ft), about 7.3 kilometres (4.5 mi) southwest of the community of Jones Falls.

Hart Lake drains through two outlets, each of which eventually empty into the Cataraqui River, which flows to Lake Ontario at the city of Kingston.

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