| WEC 19: Undisputed | |
| Promotion: | World Extreme Cagefighting |
| Date: | March 17, 2006 |
| Venue: | Tachi Palace Hotel & Casino |
| City: | Lemoore, California |
| Previousevent: | WEC 18: Unfinished Business |
| Followingevent: | WEC 20: Cinco de Mayhem |
WEC 19: Undisputed was a mixed martial arts event held by World Extreme Cagefighting on March 17, 2006 at the Tachi Palace Hotel & Casino in Lemoore, California.[1] The event aired live on the HDNet Fights.
Eight past, present, or future WEC champions competed at this event, which was the most ever featured on a WEC card.