All four judges will have to be confirmed before Wednesday, May 23 when the judge auditions kick off in Liverpool.
Dermot O'Leary will be hosting the audition shows, while Caroline Flack will also be on the tour presenting spinoff series The Xtra Factor.
Gary Barlow is the only judge officially confirmed to be taking part in the series. However, Louis Walsh and Tulisa Contostavlos are almost certain to be joining him on the panel.
A replacement for Kelly Rowland on the show is yet to be named.
After the first date in Liverpool, the competition will film auditions in London, Manchester, Glasgow, Newcastle and Cardiff.
The full X Factor audition dates are as follows:
May 23 - Liverpool
May 28-30 - London
June 5-7 - Manchester
June 11 - Glasgow
June 18 - Newscastle
June 25 - Cardiff