The 23-year-old attacker will return to his parent club Hull City following the end of the 2014-15 Championship campaign for Derby.
The English youngster joined the Rams on loan from Premier League outfit Hull in the January transfer window on loan for until the end of the season.
Ince quickly established himself as a key player for Derby and played an important role in their push for the Championship playoffs.
In 18 league appearances, the former Liverpool prospect scored 11 goals and created 24 chances, while having a pass accuracy of 83% and a shot accuracy of 57%.
After making his final appearance for Derby against Reading at the iPro Stadium today, Ince posted the following messages on Twitter.
Thanks to all the derby fans for their terrific support during my time at the club, both club, fans, players have been fantastic to me.....— Thomas Ince (@RealThomasInce) May 2, 2015
It was a big heartache today but an experience still that I have enjoyed playing for derby Thanks again for all the support.— Thomas Ince (@RealThomasInce) May 2, 2015
Derby finish the season with a 3-0 home defeat and ended the 2014-15 Championship campaign in eighth place.