| Carlos Casquero | |
| Fullname: | Carlos Agustín Casquero Ruiz |
| Birth Date: | 14 September 1981 |
| Birth Place: | Sant Boi, Spain |
| Position: | Midfielder |
| Youthyears1: | 1997–1999 |
| Youthclubs1: | Oviedo |
| Years1: | 1999–2002 |
| Years2: | 2002–2004 |
| Years3: | 2004–2006 |
| Years4: | 2005 |
| Years5: | 2006 |
| Years6: | 2006–2007 |
| Years7: | 2007–2008 |
| Years8: | 2008–2010 |
| Years9: | 2010–2011 |
| Years10: | 2011 |
| Years11: | 2011–2012 |
| Years12: | 2012–2013 |
| Years13: | 2013 |
| Clubs4: | → Jaén (loan) |
| Clubs5: | → Pájara Playas (loan) |
| Clubs7: | Pájara Playas |
| Clubs9: | Târgu Mureş |
| Clubs10: | Extremadura |
| Clubs11: | Lleida Esportiu |
| Clubs12: | Puertollano |
| Clubs13: | Estepona |
| Caps1: | 64 |
| Caps2: | 42 |
| Caps3: | 6 |
| Caps4: | 7 |
| Caps5: | 16 |
| Caps6: | 25 |
| Caps7: | 27 |
| Caps8: | 45 |
| Caps9: | 6 |
| Caps10: | 12 |
| Caps11: | 17 |
| Caps12: | 10 |
| Caps13: | 11 |
| Totalcaps: | 288 |
| Goals1: | 2 |
| Goals2: | 2 |
| Goals3: | 0 |
| Goals4: | 0 |
| Goals5: | 2 |
| Goals6: | 1 |
| Goals7: | 1 |
| Goals8: | 1 |
| Goals9: | 0 |
| Goals10: | 0 |
| Goals11: | 0 |
| Goals12: | 0 |
| Goals13: | 0 |
| Totalgoals: | 9 |
Carlos Agustín Casquero Ruiz (born 14 September 1981 in Sant Boi de Llobregat, Barcelona, Catalonia) is a Spanish retired footballer who played as a defensive midfielder.