Slammiversary (2005) was a professional wrestling pay-per-view (PPV) event produced by the Total Nonstop Action Wrestling (TNA) promotion, which took place on June 19, 2005 at the TNA Impact! Zone in Orlando, Florida. It was the first event under the Slammiversary chronology and the sixth event in the 2005 TNA PPV schedule. Nine professional wrestling matches, three of which featured championships, and one pre-show match were featured on the event's card. The event commemorated TNA's third-year anniversary, after forming on June 19, 2002.