Mount Thor, officially gazetted as Thor Peak, is a mountain in Auyuittuq National Park, on Baffin Island, Nunavut, Canada.

The mountain is located 46 km (29 mi) northeast of Pangnirtung and features the Earth's greatest purely vertical drop at 1,250 metres (4,100 feet), with an average angle of 105 degrees.

The location is popular with climbers due to this feature, despite its remoteness.

Mount Thor is part of the Baffin Mountains which in turn form part of the Arctic Cordillera mountain range.