The 1989 Halloween Havoc was the inaugural 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 28, 1989, at the Philadelphia Civic Center in Philadelphia, Pennsylvania. As the name implies, it was a Halloween-themed event.

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.