Sin Piedad (2016) (Spanish for "No Mercy") was a major professional wrestling event produced by the Mexican Lucha Libre promotion Consejo Mundial de Lucha Libre (CMLL), which took place on January 1, 2016 in Arena México, Mexico City, Mexico. The show replaced CMLL's regular Friday night show Super Viernes ("Super Friday"). The 2016 Sin Piedad was the twelfth event under that name that CMLL has promoted, the first one to be held on New Year's Day.

The original main event match between Thunder and Último Guerrero was changed eight days before the show. The main event was replaced with two Luchas de Apuestas, or bet matches, each with the competitors risking their hair. The first of the two Apuestas matches saw Máximo Sexy face off against Kamaitachi and the second match featured lucha libre veterans Negro Casas and Super Parka.

The Mexican wrestling company Consejo Mundial de Lucha Libre (Spanish for "World Wrestling Council"; CMLL) has held a number of major shows over the years using the moniker Sin Piedad ("No Pity" or "No Mercy"). CMLL has intermittently held a show billed specifically as Sin Piedad since 2000, primarily using the name for their "end of the year" show in December, although once they held a Sin Piedad show in August as well. CMLL has on occasion used a different name for the end-of-year show but Sin Piedad is the most commonly used name. All Sin Piedad shows have been held in Arena México in Mexico City, Mexico which is CMLL's main venue, its "home". The 2016 Sin Piedad will be the first show to be held on New Year's Day and the first time CMLL has promoted a "name" show on that day, previously having promoted whatever regular house shows they happened to have on that day.

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