Jonas Petter Renkse (born 19 May 1975) is a Swedish musician in the bands Katatonia(1991–) as lead vocalist, founder, songwriter (1991–1994, 1997–) and formerly as drummer (1991–1994, 1996–1998); in Bloodbath(1998–) as bassist, founder, songwriter; and in Wisdom of Crowds (2013–) as co-vocalist.
He was also the founding member, drummer, vocalist, guitarist & songwriter of the band October Tide.