- Who
- Alex O'Shea
- What
- 3/41/10 hour(s):minute(s):second(s)
- Where
- Ireland (Cork)
- When
The fastest marathon in a fireman's uniform is 3 hr 41 min 10 sec and was achieved by Alex O'Shea (Ireland) at the Cork City Marathon in Cork, Ireland, on 2 June 2014.