UFC 51: Super Saturday was a mixed martial arts event held by the Ultimate Fighting Championship on February 5, 2005 (Super Bowl weekend) at the Mandalay Bay Events Center in Las Vegas, Nevada. The event was broadcast live on pay-per-view in the United States and Canada, and later released on DVD.
The event was to be held in Japan, but UFC President Dana White moved it back to Las Vegas. Headlining the card were fan favorites Tito Ortiz and Vitor Belfort.
The total fighter payroll for the event was $456,000.