Jade Johnson came second in the 2002 Commonwealth Games. Later she won the silver medal at the 2002 European Championships and finished fourth at the 2003 World Championships. Her personal best is 6.81 meters, an Olympic qualifying distance, achieved in 2008 during the European Cup, where she placed second.
She came seventh in the final of the long jump in the 2008 Beijing Olympics, jumping 6.64 meters. She was very frustrated with her own performance and expressed a dissatisfaction that the winner the Brazilian Maurren Higa Maggi had previously tested positive for performance-enhancing drugs.
Jade was selected to represent Great Britain at the 2009 European Indoor Championships but had to withdraw due to an injury.
During August 2009, it was announced that she would compete in the 2009 series of Strictly Come Dancing on BBC1 with professional dancer Ian Waite. During final dress rehearsal for the 14th November edition of the show, Jade suffered a serious injury to her right knee, and therefore was forced to withdraw on the 21st November. She stated that she was “devastated” to withdraw but had to be “realistic” and praised her dance partner Ian Waite for his support.