33 years.
That was John Dane, 58 years old, who competed in sailing.
she started sailing sailing when she was 16
The oldest Olympic competitor representing Ireland was Joe McMenamin who was 59 years, 319 days old when he competed in three person keelboat sailing at the 1972 Games in Munich ... he finished 16th.
He is thirty years old in 2012.
15
He started competing when he was 8 years old, and he is 25, so he has competed for 17 years.
28
1) Croquet - competed at the 1900 Games in Paris and never again. 2) Tug-of-War - first competed at the 1900 Games in Paris and last competed at the 1920 Games in Antwerp. 3) Golf - competed at the 1900 and 1904 Games only. 4) Cricket - competed at the 1900 Games only. 5) Polo - first competed at the 1900 Games and last competed at the 1936 Games in Berlin. 6) Rugby - first competed at the 1900 Games and last competed at the 1924 Games in Paris.
A Galleon
He competed in his first race when he was seven years old.
He was 14 when he competed in Beijing.
14 years old