| Carlos Mereles | |
| Fullname: | Carlos Antonio Mereles Cristaldo |
| Birth Date: | 9 July 1979 |
| Birth Place: | Yaguarón, Paraguay |
| Height: | 1.80 m |
| Position: | Midfielder |
| Years1: | 2002–2004 |
| Clubs1: | Sport Colombia |
| Years2: | 2005–2006 |
| Clubs2: | Tacuary |
| Years3: | 2007–2009 |
| Clubs3: | Sportivo Luqueño |
| Years4: | 2009 |
| Clubs4: | Guaraní |
| Years5: | 2010 |
| Clubs5: | Sportivo Trinidense |
| Years6: | 2010 |
| Clubs6: | 3 de Febrero |
| Years7: | 2011 |
| Clubs7: | Fernando de la Mora |
| Years8: | 2012 |
| Clubs8: | General Caballero |
| Years9: | 2012 |
| Clubs9: | Unión de Sunchales |
| Years10: | 2013–2014 |
| Clubs10: | Independiente F.B.C. |
| Years11: | 2013–2014 |
| Clubs11: | Adelante |
| Years12: | 2015 |
| Clubs12: | Ocampo Fábrica |
Carlos Antonio Mereles Cristaldo (born 9 July 1979 in Yaguarón, Paraguay) is a Paraguayan former professional footballer who played as a midfielder.