| Dominic Mahony | |
| Birth Date: | 26 April 1964 |
| Birth Place: | Plymouth, England |
| Country: | England |
| Sport: | Modern pentathlon |
| Event: | Modern Pentathlon |
| Olympics: | 1988 Seoul |
| Show-Medals: | yes |
Dominic John Grehan Mahony MBE (born 26 April 1964) is a British former modern pentathlete. He competed in the 1988 Summer Olympics and at the 1992 Summer Olympics, winning a bronze medal at the 1988 Games.[1] In 1986, he won the épée title at the British Fencing Championships.[2]
Mahony attended Millfield School from 1977 to 1982.[3] He was appointed Member of the Order of the British Empire (MBE) in the 2014 New Year Honours for voluntary services to modern pentathlon.