Diogo Coutinho (born 3 September 1977 in Lisbon) is a Portugueserugby union footballer. He plays as a flanker for Direito, a Lisbon team.
He has 34 caps for Portugal since his debut in 2000 and has scored 4 tries, 20 points in aggregate. Coutinho played in three games at the 2007 Rugby World Cup finals, and was chosen as the Man of the Match in the 10-14 loss to Romania.
His most recent match was at 1 December 2007, in an 8-23 loss to Romania.