Matías Donnet (born 18 April 1980 in Esperanza, Santa Fe) is an Argentine former professional footballer who played as a midfielder.

Donnet left D.C. United after the 2006 season and returned to Argentina with Belgrano de Córdoba.

Between 2007 and 2009 he played for Newell's Old Boys before returning to his first club Unión de Santa Fe.

In summer 2014, Donnet signed with Antigua GFC of the Guatemalan Liga Mayor for one year.

[2] At the end of 2019 it was confirmed, that Donnet had been hired as a youth coach at Boca Juniors.