Marcos Peña (born March 15, 1977) is an Argentine politician, author and political scientist who served as Chief of the Cabinet of Ministers during Mauricio Macri's presidency.
Previously, he had served as Legislator of the City of Buenos Aires by the Commitment to Change Front.
He is one of the main advisers of Republican Proposal.
He himself led the campaign that led Macri to be elected in 2015 as President of Argentina.