Irene Alfonso García (born 6 February 1981) is a retired Spanish middle distance runner who specialized in the 800 and 1500 metres. In her early career, she competed at the 2000 World Junior Championships without reaching the final, and placed lowly in the junior races at the 1999 and 2000 World Cross Country Championships (53rd and 41st). She later finished ninth at the 2003 European U23 Championships before reaching full senior age.