The 2015 Chicago aldermanic elections happened on February 24, 2015, to elect the 50 Aldermen that represent Chicago in the City Council. The elections were non-partisan and if no candidate received an absolute majority, a runoff would be held between the top two finishers on April 7, 2015. Ward boundaries had been redrawn since the previous 2011 election, to reflect the results of the 2010 United States Census. The new ward map had been approved by the Chicago City Council in January 2012.