John Joseph Wardle (born 11 August 1958), known by the stage name Jah Wobble, is an English bass guitarist and singer. He became known to a wider audience as the original bass player in Public Image Ltd (PiL) in the late 1970s and early 1980s; he left the band after two albums.

Following his departure from PiL, he developed a solo career. In 2012, he reunited with fellow PiL guitarist Keith Levene for Metal Box in Dub and the album Yin & Yang. Since 2013, he has been one of the featured pundits on Sunday morning's The Virtual Jukebox segment of BBC Radio 5 Live's Up All Night with Dotun Adebayo. His autobiography, Memoirs of a Geezer, was published in 2009.