Lockdown (2005) was a professional wrestling pay-per-view (PPV) event produced by the Total Nonstop Action Wrestling (TNA) promotion, which took place on April 24, 2005, at the TNA Impact! Zone in Orlando, Florida. It was the first event under the Lockdown chronology and the fourth event in the 2005 TNA PPV schedule. Eight professional wrestling matches and one pre-show match were featured on the event's card. Every match took place inside a six sided steel structure known as the Six Sides of Steel. As a result, Lockdown was the first-ever all steel cage event held in professional wrestling.

Allen Jones
AJ Styles

Chris Parks
Abyss

Jeffrey Jarrett
Jeff Jarrett

Montaque Brown
Monty Brown

Monty Sopp
The Outlaw

Page Falkinburg Jr.
"Diamond" Dallas Page

Sean Waltman
Sean Waltman
Brian James
B.G. James

Daniel Covell
Christopher Daniels

Elix Skipper
Elix Skipper

James Cox
"Cowboy" James Storm

Chris Harris
"Wildcat" Chris Harris

Jeremy Fritz
Eric Young

Peter Williams III
Petey Williams

Jeff Hardy
Jeff Hardy