| Headercolor: | lightblue |
| Siobhan Byrne | |
| Fullname: | Siobhan Claire Byrne |
| Birth Date: | 13 August 1984 |
| Birth Place: | Ostfildern, Baden-Württemberg, West Germany |
| Weight: | 690NaN0 |
| Sport: | Fencing |
| Event: | Sabre |
| Collegeteam: | Ohio State Buckeyes (USA) |
| Show-Medals: | yes |
Siobhan Claire Byrne (born August 13, 1984) is a German-born Irish sabre fencer.[1] She is a four-time All-American (2005–2008), a three-time Academic All-Big Ten honoree, and a two-time medalist at the Junior World Cup Fencing Series.[2] She also won a bronze medal for her category at the 2007 Junior European Championships in Conegliano, Italy, and was ranked as the no. 1 Irish fencer.[3]
Byrne represented Ireland at the 2008 Summer Olympics where she competed in the women's individual sabre event. She lost the first preliminary round match to Poland's Irena Więckowska, with a score of 8–15.[4]
Byrne was also a member of the Ohio State Buckeyes fencing team (under coach Vladimir Nazlymov), and a summa cum laude graduate, with a degree in health information management and systems, at Ohio State University in Columbus, Ohio.[3]