WCW Thunder, or simply Thunder, is an American professional wrestling show that was produced by World Championship Wrestling (WCW) which aired on TBS Superstation from January 8, 1998 to March 21, 2001.

The popularity of WCW in 1996 and 1997 allowed for the creation of a new show, which became WCW Thunder. Thunder was taped on Tuesday nights and then aired on Thursday, a change for WCW as producer Eric Bischoff was very keen on its primary show WCW Monday Nitro being aired live every week.

The rights to WCW Thunder now belong to WWE, who purchased WCW properties in 2001. The trademark for "WCW Thunder" was renewed by WWE in 2018. As of June 30, 2023, all 156 episodes of Thunder are available to stream on the WWE Network and Peacock.