The 32-year-old Scottish attacking midfielder has completed a transfer to the KC Stadium after spending just eight months in MLS.
Maloney has signed a two-year deal with the Tigers for an undisclosed fee.
SIGNING: @HullCity have completed the signing of Shaun Maloney from Major League Soccer side @ChicagoFirepic.twitter.com/15s00uA7Hp
— Hull City (@HullCity) August 27, 2015
Of his decision to leave the Fire, who signed him as a Designated Player from Wigan Athletic in January, Maloney told the club's official website: “This was a very difficult decision to make but one that I felt I needed to make for various reasons.
“Although my time at the club was brief, I feel very fortunate for the experience to play for the Chicago Fire and would like to thank in particular my team-mates for the time I spent with them and hope that in the future the club can become successful on the pitch once again."