Leviathan, Steel roller coaster in Canada's Wonderland, Ontario, Canada

Leviathan is a steel giga coaster in the Medieval Faire section of Canada's Wonderland, Vaughan, Ontario. Built by Bolliger & Mabillard, its 1,672-metre track reaches 93.3 metres at the lift hill and sends trains through an 80-degree first drop into a 30-metre tunnel, then over a 50-metre overbanked turn, a 56-metre camelback and a 115-degree hammerhead above the parking lot. The station area features a painted sea-serpent head sculpture with a yellow "LEVIATHAN" banner and water cascading over stones.

Leviathan was announced on 18 August 2011 and its track was finished on 7 February 2012; the first test run followed on 15 March. Season pass holders rode from 27 April 2012, the public from 6 May. It was the park's 16th coaster and the first Bolliger & Mabillard giga coaster, built after Walter Bolliger acknowledged he "owed" the park a favour.

Leviathan stands in Canada's Wonderland's Medieval Faire section, where its station is fronted by a rock fountain topped with a painted blue and teal sea-serpent head, its mouth open to show white teeth. A yellow banner across the sculpture reads "LEVIATHAN". The name comes from the biblical sea monster, and the same face covers the front of each of the three trains.

Leviathan stands in the Medieval Faire section, with its lift hill and first drop rising beside the park's main entrance and guest parking lot, where the 56-metre camelback and 115-degree hammerhead turn pass overhead. Riders sit four abreast in 32-seat trains held by clamshell lapbars and seatbelts; the front car carries a sculpture of the serpent's face. One cycle lasts about 3 minutes 28 seconds.

The January 2012 inaugural ride auction generated 40,000 Canadian dollars for charitable causes while offering participants first access to this record-setting attraction.