The Rey del Ring (2015) show was an annual professional wrestling major event produced by Mexican professional wrestling promotion International Wrestling Revolution Group (IWRG), and took place on April 5, 2015, in Arena Naucalpan, Naucalpan, State of Mexico, Mexico. The main event was the Eponymous IWRG Rey del Ring tournament, the thirteenth annual version of the tournament, which is IWRG's version of WWE's Royal Rumble event.

The IWRG Rey del Ring refers both to an annual tournament and a professional wrestling championship promoted by the Mexican Lucha libre professional wrestling promotion International Wrestling Revolution Group (IWRG). From 2002 until 2011 the IWRG Rey del Ring only referred to an annual 30-man tournament, but as of the 2011 tournament there is also a physical championship belt that is and can be defended throughout the year.