| Birth Date: | 7 February 1980 |
| Birth Place: | Lisbon |
| Weight: | 213lbs |
| Ru Position: | Wing Centre |
| Repyears1: | 2003–2010 |
| Repcaps1: | 37 |
| Reppoints1: | 20 |
| Relatives: | Diogo Mateus (twin) |
David Mateus (born 7 February 1980) is a Portuguese rugby union footballer. His position in the field is as a wing or center.
He played for Belenenses. Mateus has a twin brother, Diogo Mateus, with whom he played in the 2008 Hong Kong Sevens as part of the Portugal national rugby union team.[1]
He had 37 caps for Portugal, from 2003 to 2010, scoring 4 tries, 20 points on aggregate. He was present at the "Lobos" squad that entered the 2007 Rugby World Cup, where he played in the matches against Scotland[2] and Italy, without scoring.[3]