The 1991 Halloween Havoc was the third annual Halloween Havoc professional wrestling pay-per-view (PPV) event produced by World Championship Wrestling (WCW). The event took place on October 27, 1991, from the UTC Arena in Chattanooga, Tennessee. This was also the first Halloween Havoc held by WCW alone following its split from the National Wrestling Alliance (NWA) in January 1991.

Halloween Havoc is a professional wrestling event currently produced by WWE. Since 2020, it has been held annually for the company's developmental brand, NXT. As the name implies, it is a Halloween-themed show held in October.