| Pos | Name | Country | stamps | Since |
|---|---|---|---|---|
| 442 | Oms Marçal | España | 12 | 29/12/2009 |
| 210 | Ontiveros Ileana | México | 155 | 27/06/2013 |
| 268 | Ordóñez Santos Dario | España | 89 | 10/07/2010 |
| 817 | Orsi Adriana | Argentina | 1 | 15/01/2018 |
| 978 | Ortega Alberto | España | 2 | 13/12/2012 |
| 603 | Ortega Lia | España | 7 | 12/03/2020 |
| 504 | Ortiz David | Guatemala | 14 | 06/09/2011 |
| 638 | Ortiz Vidal Josep Manel | España | 3 | 02/09/2010 |
| 314 | Osorio Luis | España | 45 | 15/10/2011 |
| 230 | Otero Daniel | España | 31 | 25/11/2010 |
| 134 | Pacheco Omar | México | 213 | 14/09/2009 |
| 836 | Padilla Villalobos Renato | Perú | 1 | 04/03/2018 |
| 759 | Paduraru Ioan | España | 2 | 18/11/2018 |
| 785 | Paes Jesus | España | 2 | 20/10/2019 |
| 790 | Pagés Lledó Fernando | España | 1 | 15/12/2009 |
| 961 | Paiva José | Portugal | 1 | 23/11/2016 |
| 329 | Palao Carpena Aarón | España | 13 | 01/02/2010 |
| 983 | Palau Roca Montse | España | 1 | 17/11/2013 |
| 689 | Palmon Irina | España | 4 | 24/03/2016 |
| 453 | Palomo Miguel | España | 6 | 23/03/2013 |