The 2008 Lockdown was a professional wrestling pay-per-view (PPV) event produced by the Total Nonstop Action Wrestling (TNA) promotion, which took place on April 13, 2008, at the Tsongas Arena in Lowell, Massachusetts. It was the fourth under the Lockdown chronology and fourth event in the 2008 TNA PPV schedule. Eight professional wrestling matches, two of which for championships, were featured on the card. In the concept of Lockdown events, every match took place inside a six-sided steel structure known as the Six Sides of Steel.

The Tsongas Center at UMass Lowell is a multi-purpose facility owned by the University of Massachusetts Lowell and located in Lowell, Massachusetts. The arena was opened on January 27, 1998, and dedicated to the memory of the late Paul Tsongas, prominent Lowell native and U.S. senator. The arena was built with $4 million in funding from both the city and the university, plus another $20 million contributed from the Commonwealth of Massachusetts.