| Pos | Name | Country | stamps | Since |
|---|---|---|---|---|
| 49 | Jimenez Jose Ant. | España | 2154 | 19/11/2011 |
| 531 | Jimenez Diaz Jose Maria | España | 8 | 29/10/2019 |
| 4 | Jiménez Frías Francisco Javier | España | 59179 | 29/03/2014 |
| 622 | Jiménez Rivero Adrián | España | 2 | 24/02/2014 |
| 409 | Jones Carolina | Estados Unidos | 18 | 02/01/2016 |
| 708 | Jorge Sanchez María Yasmin | España | 3 | 06/08/2019 |
| 818 | Jové Melendres Maria Del Mar | España | 1 | 18/10/2017 |
| 571 | Juan Marti Agustin | España | 4 | 06/06/2014 |
| 976 | Junco De Los Ríos Alberto | España | 1 | 20/06/2021 |
| 734 | Jurado Ramírez Nora | España | 2 | 03/07/2018 |
| 232 | Kam Pavel | Tailandia | 218 | 24/02/2020 |
| 587 | Karakulakov Miroslav | Bulgaria | 4 | 01/02/2014 |
| 529 | Karkache Sergio | Brasil | 9 | 26/04/2011 |
| 241 | Kira Marcelo | Argentina | 150 | 29/03/2010 |
| 711 | Kittler Mariano | Argentina | 7 | 22/03/2010 |
| 805 | Kopera Ines | España | 1 | 25/04/2010 |
| 278 | La Yla | España | 89 | 03/04/2009 |
| 218 | Labycz Jonatan | Argentina | 188 | 27/01/2010 |
| 631 | Lacal David | España | 1 | 19/07/2009 |
| 880 | Laforet Lodos Héctor | España | 1 | 05/08/2018 |