| Birth Date: | 27 December 1971 |
| Birth Place: | Montevideo, Uruguay |
| Weight: | 160lbs |
| Ru Position: | Fullback |
| Repyears1: | 1996-2003 |
| Repcaps1: | 42 |
| Reppoints1: | 71 |
Alfonso Cardoso (born Montevideo, 27 December 1971) is a Uruguayan former rugby union player. He played as a fullback.
For his club rugby, Cardoso played for Old Boys, and regularly represented them at the Punta Del Este Sevens.[1]
He earned 42 caps for Uruguay, from 1996 to 2003, with 14 tries and 1 conversion, 71 points in aggregate.He played twice at the Rugby World Cup finals, in 1999 and 2003. He was capped three times at the first presence, scoring a try, and two times at the second, again scoring a try.[2]