| UFC 44: Undisputed | |
| Promotion: | Ultimate Fighting Championship |
| Date: | September 26, 2003 |
| Venue: | Mandalay Bay Events Center |
| City: | Paradise, Nevada |
| Attendance: | 10,400 |
| Gate: | $127,985 |
| Buyrate: | 94,000 |
| Previousevent: | UFC 43: Meltdown |
| Followingevent: | UFC 45: Revolution |
UFC 44: Undisputed was a mixed martial arts event held by the Ultimate Fighting Championship on September 26, 2003, at the Mandalay Bay Events Center in the Las Vegas suburb of Paradise, Nevada. The event was broadcast live on pay-per-view in the United States, and later released on DVD.
Headlining the card was a Light Heavyweight Championship unification bout between Tito Ortiz and Randy Couture. The total fighter payroll for the event was $467,500.[1] The ring interviewer was Eddie Bravo. UFC 44 marked the first UFC appearance of future Welterweight Strikeforce Champion Nick Diaz.