The CMLL World Light Heavyweight Championship (Campeonato Mundial Semi Completo de CMLL in Spanish) is a singles professional wrestling world championship promoted by Consejo Mundial de Lucha Libre (CMLL) since 1991. As it is a professional wrestling championship, it is not won legitimately: it is instead won via a scripted ending to a match or awarded to a wrestler because of a storyline. The official definition of the Light Heavyweight weight class in Mexico is between and , but is not always strictly enforced. Because Lucha Libre emphasizes the lower weight classes, this division is considered more important than the normally more prestigious heavyweight division of a promotion. All title matches take place under two out of three falls rules.
MÃÂstico is the current champion, in his first reign. He won the title by defeating MJF in a Title vs. Mask match at the CMLL 92nd Anniversary Show on September 19, 2025 in Mexico City, Mexico.
The first champion to be recognized by CMLL was Jerry Estrada, who defeated Pierroth Jr. in the finals of a 16-man tournament that took place between September 15 and September 26, 1991. Overall, there have been twenty reigns shared among eighteen wrestlers, and two vacancies. Dr. Wagner Jr. and Atlantis are the only two wrestlers to have held the title twice; Dr. Wagner Jr. is listed as an unofficial three-time champion, but he is not recognized as such by CMLL. MJF's sole reign is the shortest at 49 days, while Niebla Roja's sole reign is the longest at 1,861 days. Aquarius' unofficial title reign is the shortest on record, 8 days, but is not acknowledged by CMLL.
As of , .
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