"Ironic" is a song by Canadian singer Alanis Morissette. It was released in February 1996 as the third single from her third studio album, Jagged Little Pill (1995). It was written by Morissette and Glen Ballard, and was produced by him. "Ironic" is a song written in the key of B major, and includes a moderate tempo of eighty-five beats per minute. The lyrics present several situations that are described as "ironic"; this has led to debate as to whether any of these actually match the accepted meaning of irony.

For six weeks, the track topped the Canadian RPM Top Singles chart. It also reached the top five in Australia, New Zealand, and Norway. In the United States, the song reached number four on April 13, 1996, and since then it has been her highest-charting single on the Billboard Hot 100. "Ironic" was certified gold by the Recording Industry Association of America (RIAA). The song won the Juno Award for Single of the Year, and received two Grammy Award nominations in 1997, for Record of the Year and Best Short Form Music Video. French director Stéphane Sednaoui filmed the music video. In it, Morissette drives through a winter landscape, and she plays multiple roles as her passengers. MTV nominated the music video for six MTV Video Music Awards in 1996, winning three of them. The music video was listed on VH1's "Greatest Music Videos" list and was parodied by DBA Flip, Allison Rheaume, Rusty and "Weird Al" Yankovic.

In September 2001, following the September 11 attacks, "Ironic" was labeled inappropriate due to its lyrics by American mass media company Clear Channel Communications. The song was included on the set list of Morissette's Jagged Little Pill World Tour (1995), and her compilation albums MTV Unplugged (1999), The Collection (2005), among others. The song was covered by Mexican duet Jesse & Joy for their album Esta Es Mi Vida Sesiones (2007), and by American band Four Year Strong for their cover album Explains It All (2009).