- | 1 Episodes

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2004 | 23 Episodes

Season 1 of The X Factor premiered on September 4, 2004.

2005 | 30 Episodes

Season 2 of The X Factor premiered on August 20, 2005.

2006 | 30 Episodes

Season 3 of The X Factor premiered on August 19, 2006.

2007 | 28 Episodes

Season 4 of The X Factor premiered on August 18, 2007.

2008 | 30 Episodes

Season 5 of The X Factor premiered on August 16, 2008.

2009 | 30 Episodes

Season 6 of The X Factor premiered on August 22, 2009.

2010 | 30 Episodes

Season 7 of The X Factor premiered on August 21, 2010.

2011 | 31 Episodes

Season 8 of The X Factor premiered on August 20, 2011.

2012 | 31 Episodes

Season 9 of The X Factor premiered on August 18, 2012.

2013 | 32 Episodes

Season 10 of The X Factor premiered on August 31, 2013.

2014 | 12 Episodes

Season 11 of The X Factor premiered on August 30, 2014.

2015 | 28 Episodes

Season 12 of The X Factor premiered on August 25, 2015.

2016 | 32 Episodes

Season 13 of The X Factor premiered on August 27, 2016.

2017 | 28 Episodes

Season 14 of The X Factor premiered on September 2, 2017.

2018 | 28 Episodes

Season 15 of The X Factor premiered on August 31, 2018.