| Pos | Name | Country | stamps | Since |
|---|---|---|---|---|
| 84 | Cruz Alejandro | España | 1621 | 05/04/2011 |
| 62 | Cruz Mikel | España | 1751 | 20/08/2011 |
| 681 | Croce Jesica | Argentina | 4 | 24/02/2014 |
| 825 | Crespo Yosuan | Cuba | 1 | 13/09/2017 |
| 289 | Covalski Peter | España | 57 | 02/12/2010 |
| 661 | Cos-gayon Sergio | España | 5 | 01/08/2013 |
| 932 | Cortés Galván Ángel | España | 1 | 31/10/2019 |
| 78 | Cortes Antonio | España | 1089 | 20/02/2009 |
| 202 | Cortés Miguel Angel | España | 106 | 11/03/2011 |
| 996 | Corro Santiago | España | 95 | 30/09/2012 |
| 553 | Corrales Héctor Rubén | Argentina | 9 | 28/07/2012 |
| 490 | Cordon Victor | España | 12 | 06/10/2010 |
| 649 | Cordón Jorge | España | 5 | 06/08/2015 |
| 352 | Cordero Cruz | México | 15 | 14/05/2010 |
| 199 | Corbillo Ernest | España | 183 | 21/09/2010 |
| 688 | Contreras Lerín Antonio J. L. | España | 3 | 27/11/2016 |
| 168 | Conde Ferreira Jose Manuel | España | 366 | 06/03/2016 |
| 319 | Conde Cameselle Cesar | España | 33 | 30/08/2008 |
| 124 | Con Javi | España | 950 | 10/09/2016 |
| 971 | Comanecci Nadia Lorena | Estados Unidos de América | 1 | 23/05/2011 |