| Carlos Díaz | |
| Fullname: | Carlos Ríchard Díaz |
| Birth Date: | 1979 2, df=yes |
| Birth Place: | Montevideo, Uruguay |
| Position: | Full back |
| Clubnumber: | 21 |
| Years1: | 1997–2007 |
| Years2: | 2007 |
| Years3: | 2008 |
| Years4: | 2009–2010 |
| Years5: | 2010–2011 |
| Years6: | 2011–2012 |
| Years7: | 2012–2015 |
| Years8: | 2015– |
| Clubs5: | Rampla Juniors |
| Clubs6: | Tacuarembó |
| Clubs7: | Racing Club de Montevideo |
| Clubs8: | Boston River |
| Caps1: | 220 |
| Caps2: | 7 |
| Caps3: | 1 |
| Caps4: | 20 |
| Caps5: | 11 |
| Caps6: | 10 |
| Goals1: | 4 |
| Goals2: | 0 |
| Goals3: | 0 |
| Goals4: | 1 |
| Goals5: | 0 |
| Goals6: | 0 |
| Nationalyears1: | ?–1999 |
| Nationalyears2: | 1997–2001 |
| Nationalteam1: | Uruguay U20 |
| Nationalteam2: | Uruguay |
| Nationalcaps2: | 6 |
| Nationalgoals2: | 0 |
Carlos Ríchard Díaz (born 4 February 1979, in Montevideo) is a Uruguayan former footballer. He last played for Boston River in the Segunda División Uruguay.
He was a two-times FIFA U-20 World Cup player.