Iñaki Villanueva Martín (born 10 February 1991) is a Spanish rugby sevens player.

He competed for Spain 7s at the 2016 Summer Olympics in Brazil.

[1][2][3] He was part of the squad that won the 2016 Men's Rugby Sevens Final Olympic Qualification Tournament in Monaco[4] and he played in the Olympic tournament.

His brother is Alejandro Villanueva, a former American football offensive tackle in the National Football League (NFL).