The year 2005 was the 5th year in the history of World Extreme Cagefighting, a mixed martial arts promotion based in the United States. In 2005 WEC held 5 events beginning with, WEC 13: Heavyweight Explosion.
WEC 13: Heavyweight Explosion was an event held on January 22, 2005 at the Tachi Palace in Lemoore, California, United States.
WEC 14: Vengeance was an event held on March 17, 2005 at the Tachi Palace in Lemoore, California, United States.
WEC 15: Judgment Day was an event held on May 19, 2005 at the Tachi Palace in Lemoore, California, United States.
WEC 16: Clash of the Titans 2 was an event held on August 18, 2005 at the Tachi Palace in Lemoore, California, United States.
WEC 17: Halloween Fury 4 was an event held on October 14, 2005 at the Tachi Palace in Lemoore, California, United States.