The 1990 Halloween Havoc was the second annual Halloween Havoc professional wrestling pay-per-view (PPV) event produced by World Championship Wrestling (WCW) under the National Wrestling Alliance (NWA) banner. It took place on October 27, 1990, from the UIC Pavilion in Chicago, Illinois. This was also the final Halloween Havoc produced by WCW under the NWA, as in January 1991, WCW split from the NWA.