Tijs Michiel Verwest was born in Breda, North Brabant, Netherlands on January 17, 1969. He had an interest for music since the age of twelve. When he was fourteen he decided to dedicate more time to it and began DJing professionally at school parties. He then moved on to become a resident DJ between 1985 and 1994 at several clubs in the Netherlands after his manager and friend Wilfred encouraged him. However, it was at The Spock, a small club in Breda, where he was able to fine-tune his own style by playing in a separate room from 10 p.m. until 4 a.m. on weekends. In the beginning of his career as a DJ he mostly played New Beat and acid house, and many Madonna songs because her music shows that she likes to dance. Before the release of her album there were already dancemixes like "Vogue" which was one of the songs of Spock.
In 1994 he began releasing material on Noculan Records' sub-labels Chemo and Coolman. During these years, he produced hardcore/gabber tracks under aliases such as Da Joker and DJ Limited. He was later discovered by the general manager of Rotterdam-based Basic Beat Recordings. In late-1994 he signed to Basic Beat were he met Arny Bink, Tiësto released records on the sub-label Trashcan, founded by Arny, and later created the Guardian Angel sub-label with Arny in which they introduced the popular Forbidden Paradise series. Meanwhile from 1995 to 1996 he released four extended plays on Bonzai Jumps and XTC, sub-labels of Lightning Records. In 1997 Tiësto joined his friend Yves Vandichel on his sub-label, DJ Yves, a division of the now defunct Human Resource label XSV Music. In the fall of 1997, both Arny and Tiësto decided to leave Basic Beat and create their own parent label, now known as Black Hole Recordings, Trashcan was discontinued and Guardian Angel continued releasing music until 2002. Through Black Hole, Tiësto released the Magik series and also created two major sub-labels in 1998; In Trance We Trust and SongBird. From 1998 to 1999 Tiësto released music on Planetary Consciousness were he met A&R Hardy Heller and invited him to release some records on Black Hole. Tiësto later included the In Search of Sunrise series on SongBird. In 1999, Tiësto joined forces with fellow Dutch deejay Ferry Corsten to create the trance based duo of Gouryella. To highlight the importance in the expansion of the trance environment at the time, there were 20 different CD releases of the 4 Gouryella tracks from 9 different labels. He also collaborated with Benno de Goeij from 1998 to 2000 under the name Kamaya Painters. Since November 1999 he performed monthly as a resident at Gatecrasher in Sheffield, one of the most popular clubs in England. In 1999 he also played in a 12-hour set, being his longest lasting concert in Amsterdam.
Tiësto announced his residence at Privilege which was officially recognised by the Guinness World Records as being the largest club in the world. He played in Ibiza every Monday, from July 7 until September 22. The gigs consisted of four hour sets in the style of his In Search of Sunrise series. In 2007 he had released In Search of Sunrise 6: Ibiza which was inspired by the island. The residencies also featured the performance of guest deejays, all selected by Tiësto, such as Chris Lake, Andy Duguid, Mat Zo, Cosmic Gate, Alex Kunnari and Sander van Doorn as well as exclusive appearances by Fonzerelli and Airbase.
Until early 2006 Tiësto had a relationship with Dutch model Monique Spronk. On January 10, 2008, Dutch newspaper De Telegraaf announced that Tiësto and his girlfriend Stacey Blokzijl were going to get married on October 10, 2008. He proposed to her in December 2007 while they were visiting Mauritania. Tiësto cancelled his wedding for October 10, because he claimed to have a busy schedule and too little time for the preparations. Around Christmas 2008 Stacey Blokzijl broke up with Tiësto because of the constant delay of their wedding.