South River is a village on Highway 124 near Algonquin Park in the Almaguin Highlands region of Parry Sound District of Ontario, Canada.

Currently, South River is served by the Ontario Northland bus and the privately-owned Northern Airport Passenger Service shuttle.

Logging in the area began in the 1860s, but it was not until 1881 when the first settlers, Robert Carter and his wife, arrived following the completion of the Grand Trunk Railway.

Within a few years, they opened a general store and the new community, located on the eponymous South River, had hotels, a bank, a butcher shop, and jeweller.

[8] On Thanksgiving weekend of 1997, tragedy struck at the Hanson Homestead on Eagle Lake Road, when a lightning strike hit a group of eight working on the family maple syrup lines, and fatally injuring Dino Devalis.

This strike was brought to light in the 2009 Canadian documentary Act of God by Jennifer Baichwal and featured an interview with Jean Ivens about the event.

Cottagers are beginning to head north from Muskoka to more wilderness locations such as those found at Algonquin Moose Lodge in South River.

A colourful local landmark is the Algonquin Motel, which uses painted cabins and rooms to attract visitors.

A popular swimming spot is Eagle Lake Narrows, which is served by a general store that rents canoes.