Tiga James Sontag (born 18 September 1974), known simply as Tiga (), is a Canadian musician, DJ and record producer of electronic dance music. He has released three albums, Sexor, Ciao!, and No Fantasy Required. Sexor won the 2007 Juno Award for Dance Recording of the Year. Tiga released a selection of compilations in the early 2000s, featuring mixes such as American Gigolo, DJ-Kicks: Tiga and, Mixed Emotions, which put him on the map as one of "the world's best mixers". His compilation mix, Tiga Non-Stop, was released in November 2012, and premiered Tiga's latest single "Plush". The mix also features tracks from artists such as Kindness, Duke Dumont and Blawan.

Tiga has remixed songs from The xx, LCD Soundsystem, The Kills, Cabaret Voltaire, Scissor Sisters, Peaches, Moby, Depeche Mode, Justice, Friendly Fires and Mylo. Along with Zombie Nation, Tiga is half of ZZT, and has released material as The Dove, Rainer Werner Bassfinder (with Jesper Dahlbäck), and TGV (with Mateo Murphy). He has also co-produced music with Soulwax, James Murphy, Chilly Gonzales, Jesper Dahlbäck, and Matthew Dear, who he worked with on "Plush".

As a solo artist, Tiga released "Sunglasses at Night" with Finnish producer Jori Hulkkonen. The single reached number 25 in the UK Dance Chart. Other successful chart singles include "Pleasure From the Bass", "You Gonna Want Me" featuring Jake Shears, and his 2009 release "Shoes", co-produced with Soulwax and Chilly Gonzales.

Tiga was the host of the BBC Radio 6 Music show My Name Is Tiga, and made his acting debut in the 2010 film Ivory Tower. The film won special mention at the Locarno International Film Festival.

Tiga hosts a podcast titled Last Party On Earth, Season 1 in 2019 featured guests Annie Mac, Pete Tong, Carl Cox.