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.

[1] Ward boundaries had been redrawn since the previous 2011 election, to reflect the results of the 2010 United States Census.

In the first round, two candidates who ran for re-election lost their seats, including Joann Thompson (who died in office, but remained on the ballot).

One candidate was removed from the ballot due to insufficient nominating petition signatures: Organizations Newspapers Incumbent second-term alderman Bob Fioretti did not seek reelection, instead, opting to run (unsuccessfully) for mayor.

Newspapers Incumbent second-term alderman Scott Waguespack was reelected, defeating Elise Doody-Jones, his sole challenger.

Organizations Newspapers Incumbent eighth-term alderman Patrick J. O'Connor was reelected, defeating Dianne Daleiden, his sole challenger.

One write-in candidate filed: Organizations Newspapers Incumbent first-term alderman James Cappleman was reelected, defeating Amy Crawford in a runoff.

Incumbent sixth-term alderman Joe Moore was reelected, defeating Don Gordon, his sole challenger.

Four candidates were removed from the ballot due to insufficient nominating petition signatures or other reasons: Newspapers Incumbent first-term alderman Debra Silverstein was reelected.

Gilbert Villegas was elected to succeed him as 36th Ward alderman, defeating Omar Aquino in a runoff.

The following candidate filed nominating petitions but withdrew before ballot certification: Organizations Newspapers Incumbent fifth-term alderman Walter Burnett Jr. was reelected, defeating Gabe Beukinga, his sole challenger.

Organizations Newspapers Incumbent first-term alderman Jason Ervin was reelected, running unopposed on the ballot, facing only a write-in opponent.

Incumbent two-term alderman Toni Foulkes ran in the adjacent 16th ward due to redistricting.

Raymond Lopez was elected to succeed her as 15th Ward alderman, defeating Rafael Yanez in a runoff.

Two candidates were removed from the ballot due to insufficient nominating petition signatures: Organizations Newspapers Incumbent second-term alderman Pat Dowell was reelected, defeating Patricia Horton, her sole challenger.

One candidate was removed from the ballot due to insufficient nominating petition signatures: Organizations Newspapers Incumbent first-term alderman William D. Burns was reelected.

One candidate was removed from the ballot due to insufficient nominating petition signatures: Newspapers Incumbent fourth-term alderman Leslie Hairston was reelected.

[140] Incumbent first-term alderman Matt O'Shea was reelected, defeating Anne Schaible, his sole challenger on the ballot.

One write-in candidate filed: Organizations Newspapers Incumbent third-term alderman Howard Brookins was reelected, defeating Marvin McNeil in a runoff.