Triplemanía XXIX was a professional wrestling supercard event produced and scripted by the Mexican professional wrestling promotion Lucha Libre AAA Worldwide (AAA or Triple A). The event took place on August 14, 2021 at Arena Ciudad de México in Mexico City. It marked the 29th year in a row that AAA has held a Triplemanía show, and the 35th overall show held under the Triplemanía banner since 1993.