The Chicago Philharmonic is an American orchestra based in Chicago, Illinois. Founded in 1988 by principals of the Lyric Opera Orchestra of Chicago, it is a musician-governed, non-profit organization consisting of over 200 classical music performers from the Chicago area. Since 2013, the artistic director and principal conductor has been Scott Speck.
In 1979, the principals of the orchestra of the Lyric Opera established the Orchestra of Illinois which performed until early 1988 when it ran into financial difficulties. The principals went on to form The Orchestral Society of Illinois in June 1988 which first performed in March 1991 as "Symphony II" under the leadership of Larry Rachleff who was the orchestra's artistic director until May 2013. In 2004, the orchestra's name was changed to The Chicago Philharmonic. The legal name of the society behind the orchestra became The Chicago Philharmonic Society in 2012. In 2013, Scott Speck, Music Director at the Joffrey Ballet, was named Artistic Director.
The Chicago Philharmonic has been the official orchestra for the Joffrey Ballet since 2012.