Antonio Ruiz Hierro (born 5 July 1959) is a Spanish retired professional footballer who played as a defender.
Born in Vélez-Málaga, Andalusia, Hierro played professionally for local Málaga, spending three seasons in La Liga and four in the Segunda División.
In the summer of 1988, after having contributed 22 matches as the club returned to the top tier, he moved to Hércules, retiring from the game at the age of 31 after a couple of Segunda División B seasons.
Hierro was the oldest of three siblings who were all footballers, and defenders. He partnered Manolo for six years at his main club whilst the youngest, Fernando, had a lengthy spell with both Real Madrid and the Spain national team, appearing on nearly 90 occasions for the latter.