The NWA World Historic Light Heavyweight Championship (Campeonato Mundial Historico de Peso Semicompleto de la NWA in Spanish) is a professional wrestling championship promoted by Consejo Mundial de Lucha Libre (CMLL). CMLL had held the NWA World Light Heavyweight Championship for over 48 years, when the relationship between the promotion and National Wrestling Alliance broke down in March 2010. Blue Demon Jr., the president of NWA Mexico, sent letters to CMLL, telling them to stop promoting the NWA-branded championships since they were no longer part of the NWA. On August 12, 2010, CMLL debuted the new NWA World Historic Light Heavyweight Championship belt and named El Texano Jr., the final CMLL-recognized NWA World Light Heavyweight Champion, as the inaugural champion.

The current champion is Atlantis Jr., who defeated Stuka Jr. to win the championship on February 4, 2023. This is Atlantis Jr.'s first title reign; his current reign is the eighth in the title's history. All title matches take place under best two-out-of-three falls rules.

The first light heavyweight division professional wrestling championship recognized in Mexico was the Mexican National Light Heavyweight Championship, created in 1942, sanctioned by the Mexico City boxing and wrestling commission and promoted by a number of different Mexican professional wrestling promotions including Empresa Mexicana de Lucha Libre (EMLL; Spanish for "Mexican Wrestling Enterprise").^[4] In 1953, EMLL joined the National Wrestling Alliance (NWA),^[5] and in 1957 EMLL was given control of the NWA World Light Heavyweight Championship after it had been inactive for around four years.^[6] From 1957 on the championship was defended primarily in Mexico on EMLL shows and occasionally in Southern California during the 1970s.^[6]

In the late 1980s, EMLL left the NWA to avoid the politics of that organization.^[5] While they left the NWA they did retain control of the NWA World Light Heavyweight Championship as their main championship of the light heavyweight division, as well as promoting the Mexican National Light Heavyweight Championship as the secondary championship.^[4][6] In 1991, EMLL was renamed "Consejo Mundial de Lucha Libre" (CMLL; "World Wrestling Council") after which they began to introduce a series of "CMLL" branded world championships.^[7] On September 26, 1991, CMLL determined the first ever holder of the CMLL World Light Heavyweight Championship as Jerry Estrada defeated Pierroth Jr. in the finals of a tournament.^[8]

In 2010, the NWA, represented by NWA Mexico president Blue Demon Jr., reached out to CMLL and asked them to stop using the NWA-branded championships since they were not part of the NWA. Blue Demon Jr. was in the process of establishing NWA Mexico as a promotion and wanted to use the championship.^[9] There had been previous attempts by the NWA to gain back control of the three NWA-branded championships that CMLL used, the light heavyweight championship as well as the NWA World Welterweight Championship and the NWA World Middleweight Championship, but in those instances, CMLL had not responded to those requests at all. The promotion did not directly respond to the latest claim; the NWA Welterweight Champion, Mephisto, commented instead, simply stating that the championships belonged to CMLL.^[10] Finally, on August 12, 2010, CMLL debuted the new NWA World Historic Light Heavyweight Championship belt and named El Texano Jr., the final CMLL-recognized NWA World Light Heavyweight Champion, as the inaugural champion.^[3] The championship was initially announced as the CMLL Historic Light Heavyweight Championship,^[3] but when the belt was unveiled, it was called the "NWA World Historic Light Heavyweight Championship" (Campeonato Mundial Historico de Peso Semicompleto de la NWA in Spanish)^[1]

Atlantis Jr. is he current champion in his first reign. He defeated Stuka Jr. For the championship on February 4, 2023. He is the eighth overall champion and the sixth individual to hold the title. Rey Bucanero is the only wrestler to have won the championship on two occasions and also holds the distinction of holding the record for the longest reign as his first reign with the championship lasted 714 days in total.^[11][12] The first champion, El Texano Jr., held the title for the shortest reign between August and December 2010, a total of 124 days.^[3][13] The championship has been vacated twice, first in 2011 when then-champion Shocker suffered a knee injury and was forced to give up the championship.^[14] In early 2015, CMLL vacated the championship once more, this time because champion Diamante Azul had not appeared at CMLL shows for several months.^[15] Current champion Hechicero was the first champion to defend the championship at a non-CMLL event as he defeated Caifan on November 27, 2016 in the main event of Lucha Memes Chairo 6 in Naucalpan, State of Mexico.^[16] Of all the champions El Texano Jr. and Shocker are the only champions to never have a successful championship defense.^[17][18] Hechicero's 641-day reign from 2016 to 2018 saw Hechicero successfully defend the championship six times, the most of any champion.^[19]

The official definition by the Mexican lucha libre commission for the light heavyweight division in Mexico is between 92 kg (203 lb) and 97 kg (214 lb).^[20] In the 20th century CMLL were generally consistent and strict about enforcing the actual weight limits.^[21] However, in the 21st century the official definitions have at times been overlooked for certain champions. One example of this was when Mephisto, officially listed as 90 kg (200 lb), won the CMLL World Welterweight Championship, a weight class with a 78 kg (172 lb) upper limit.^[20][22] While the heavyweight championship is traditionally considered the most prestigious weight division in professional wrestling, CMLL places more emphasis on the lower weight divisions, often promoting those ahead of the CMLL World Heavyweight Championship.^[7]

Championship matches usually take place under best two-out-of-three falls rules.^[7] On occasion single fall title matches have taken place, especially when promoting CMLL title matches in Japan, conforming to the traditions of the local promotion.^{[lower-alpha 1]}