The 1989 Great American Bash was the first Great American Bash professional wrestling pay-per-view (PPV) event produced by World Championship Wrestling (WCW) under the National Wrestling Alliance (NWA) banner and the fifth annual Great American Bash event overall; the previous events were held by the former NWA's Jim Crockett Promotions. It took place on July 23, 1989, at the Baltimore Arena in Baltimore, Maryland. This was the second Great American Bash held at this venue after the 1988 event.

The main event was a standard wrestling match for the NWA World Heavyweight Championship. Ric Flair defended the title against Terry Funk. Flair pinned Funk by reversing an Inside Cradle attempt to retain the title. Featured matches on the undercard saw The Road Warriors (Hawk and Animal), Midnight Express (Bobby Eaton and Stan Lane), and Steve Williams versus Fabulous Freebirds (Jimmy Garvin, Michael Hayes, and Terry Gordy) and Samoan Swat Team (Samu and Fatu) in a WarGames match, Lex Luger versus Ricky Steamboat for the NWA United States Heavyweight Championship, Sting versus The Great Muta for the NWA World Television Championship, Steiner Brothers (Rick Steiner and Scott Steiner) versus The Varsity Club (Mike Rotunda and Kevin Sullivan) in a Texas Tornado match, Jim Cornette versus Paul E. Dangerously in a Tuxedo match, The Skyscrapers (Sid Vicious and Dan Spivey) versus Dynamic Dudes (Johnny Ace and Shane Douglas), and a Two-Ring King of the Hill Battle Royal.