Results for Ireland in 400 metres, Men

Olympic and Intercalated results only.

Games	Athlete/Team	Placement
1924 Summer Olympics	Sean Lavan	4 h6 r2/4
1928 Summer Olympics	Sean Lavan	5 h5 r2/4
1948 Summer Olympics	Jimmy Reardon	5 h1 r3/4
1952 Summer Olympics	Paul Dolan	3 h10 r1/4
	Jimmy Reardon	DNS
1968 Summer Olympics	Noel Carroll	6 h6 r1/4
1972 Summer Olympics	Fanahan McSweeney	5 h5 r1/4
1996 Summer Olympics	Eugene Farrell	6 h6 r1/4
2000 Summer Olympics	Tom Coman	5 h9 r1/4
2008 Summer Olympics	David Gillick	4 h7 r1/3