Gastón Machín (born 20 February 1983) is an Argentine retired professional footballer who played as a midfielder.
Machín is a product of the famous youth system at Argentinos Juniors, he made his senior debut for the club in 2002.
Machín played for Argentinos in the Primera until the end of 2005 when he signed for Independiente for the beginning of the Clausura 2006 tournament.
In January 2010 Club Atlético Huracán signed the midfielder on loan for one year, with an option of deal extension and purchase.
On 26 June 2019 it was confirmed, that Machín had joined Spanish Segunda División B club Burgos CF on a 1-year contract.