| Zion | Da Silva | Bålsta BK | Male | 2006 | 75 | 4 |
| Zion | Hensley | Left 2 the Chin Boxing Club | Female | 2009 | 51 | 55 |
| Zion | Martina | Boxing Team ABOV | Male | 2003 | 75 | 2 |
| Zoe | Hefford | London Community Boxing | Female | 1986 | 1 | |
| Zoe | Vogels | Knockout Boxing Club | Female | 2009 | 65 | 15 |
| Zoe | Vogels | Knockout Boxing Club | Female | 2009 | 63 | 15 |
| Zoe | Vogels | Knockout Boxing Club | Female | 2009 | 63 | 1 |
| Zoë | Hefford | London Community Boxing | Female | 1986 | 60 | 1 |
| Zoher | Malak | Örebro BK | Male | 2001 | 80 | 2 |
| Zsofia | Nagy | Ungern | Female | 2008 | 52 | 1 |
| Zsolt | Német | Ungern | Male | 2005 | 80 | 1 |
| Zubair | Nikbin | Skövde BC | Male | 1990 | 75 | 1 |
| Zurab | Maghlapdidze | ATF Gym IF | Male | 2002 | 71 | 18 |