Marcos Kremer (born 30 July 1997) is an Argentine professional rugby union player who plays as a flanker for Top 14 club Clermont and the Argentina national team.

After strong performance at the Junior Championship, Kremer was called up to the Jaguares to train with top elite players in Argentina.

[2] He made his senior debut against the United States on 6 February 2016, before even making an appearance at any of the age-grade national teams.

[3] He started in all 5 games at the tournament, helping Los Pumitas to a third-placed finish after beating South Africa 49–19 in the bronze final.

[citation needed] On 20 July 2016, Kremer was named in Argentina's 33-man squad for the 2016 Rugby Championship by Daniel Hourcade at just the age of 18.