2005 | 11 Episodes
Season 0 of American Idol premiered on May 19, 2005.
2002 | 25 Episodes
Season 1 of American Idol premiered on June 11, 2002.
2003 | 39 Episodes
Season 2 of American Idol premiered on January 21, 2003.
2004 | 45 Episodes
Season 3 of American Idol premiered on January 19, 2004.
2005 | 42 Episodes
Season 4 of American Idol premiered on January 18, 2005.
2006 | 41 Episodes
Season 5 of American Idol premiered on January 17, 2006.
2007 | 41 Episodes
Season 6 of American Idol premiered on January 16, 2007.
2008 | 42 Episodes
Season 7 of American Idol premiered on January 15, 2008.
2009 | 40 Episodes
Season 8 of American Idol premiered on January 13, 2009.
2010 | 43 Episodes
Season 9 of American Idol premiered on January 12, 2010.
2011 | 39 Episodes
Season 10 of American Idol premiered on January 19, 2011.
2012 | 40 Episodes
Season 11 of American Idol premiered on January 18, 2012.
2013 | 37 Episodes
Season 12 of American Idol premiered on January 16, 2013.
2014 | 39 Episodes
Season 13 of American Idol premiered on January 15, 2014.
2015 | 30 Episodes
Season 14 of American Idol premiered on January 7, 2015.
2016 | 24 Episodes
Season 15 of American Idol premiered on January 7, 2016.
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