Asier del Horno, Spanish footballer
Asier del Horno Cosgaya (born 19 January 1981) is a Spanish retired footballer who played as a left back.

After solid displays with Athletic Bilbao, for which he appeared in 126 official games in five years scoring 17 goals, he moved to Chelsea in England, where he won the Premier League in the 2005–06 season.Subsequently, del Horno – who missed the 2006 World Cup with Spain due to a last-minute injury – returned to his country with Valencia, who loaned him to several clubs for the duration of his contract. He dealt with several physical problems in the latter part of his career, amassing La Liga totals of 187 matches and 15 goals.