The 1989–90 Full Members' Cup, known as the Zenith Data Systems Cup for sponsorship reasons, was the 5th staging of a knock-out competition for English football clubs in the First and Second Division. The winners were Chelsea and the runners-up were Middlesbrough. The competition began on 7 November 1989 and ended with the final on 25 March 1990 at the Wembley Stadium. Liverpool, Arsenal, Tottenham, Manchester United, Everton, Southampton & Queens Park Rangers opted out of this competition.