The singer will release 'Bones' on September 24.
The track marks the fourth cut from his debut album Home Again, which entered the charts at number four earlier this year and has sold over 400,000 copies to date.
'Bones' follows his top 30 hit 'Home Again' and tracks 'I'm Getting Ready' and 'I'll Get Along'.
Kiwanuka has also announced details of a one-off show on December 5 at London's Royal Festival Hall. The gig follows a string of UK festival appearances, which wraps up on September 9 at Bestival.
Earlier this year the star was named as the BBC's Sound of 2012, fending off competition from Frank Ocean and Azealia Banks.
Listen to 'Bones' below: