Marco Pablo Pappa Ponce (born 15 November 1987) is a Guatemalan footballer who plays for CSD Municipal in the Liga Nacional de Fútbol de Guatemala and is a member of the Guatemala national team.
Born in Guatemala City, Pappa, who plays as a winger, joined his local side, Municipal, in 2004 at the age of 16, and made his professional debut in a domestic league match in August 2006 against Deportivo Petapa. He scored his first professional goal against Nicaraguan side Real Madriz during the 2007 UNCAF tournament.
Pappa signed a one and a half-year loan deal with Chicago Fire on 30 July 2008, and made his MLS debut for Fire on 2 August 2008, against Chivas USA. He scored his first MLS goal on 5 April 2009, in a game against the New York Red Bulls. On 3 December 2009 The Fire exercised their option to buy Pappa's rights from Municipal, thus ending almost two-year loan deal it had for Pappa and securing his services through the 2012 season.