He dated Taylor Swift, who wrote "Forever & Always," "Last Kiss" and "Better Than Revenge" after he broke up with her on the phone. He dated actress Ashley Greene from July 2010 until March 2011, then dated model Gigi Hadid in 2015. He began a relationship with Sophie Turner in 2016; they got engaged in October of 2017. Apart from Kevin and Nick, he has a third brother named Frankie. His parents are Denise Jonas and Paul Kevin Jonas Sr.
His brother Nick formed a band of his own on the side called Nick Jonas & the Administration.