| Year |
Event |
Status |
Participants |
NOCs |
| 1906 |
400 metres Freestyle, Men |
Intercalated |
13 |
7 |
| 1908 |
400 metres Freestyle, Men |
Olympic |
25 |
10 |
| 1912 |
400 metres Freestyle, Men |
Olympic |
26 |
13 |
| 1920 |
400 metres Freestyle, Men |
Olympic |
22 |
11 |
| 1924 |
400 metres Freestyle, Men |
Olympic |
23 |
13 |
| 1928 |
400 metres Freestyle, Men |
Olympic |
26 |
17 |
| 1932 |
400 metres Freestyle, Men |
Olympic |
19 |
10 |
| 1936 |
400 metres Freestyle, Men |
Olympic |
34 |
16 |
| 1948 |
400 metres Freestyle, Men |
Olympic |
41 |
21 |
| 1952 |
400 metres Freestyle, Men |
Olympic |
48 |
29 |
| 1956 |
400 metres Freestyle, Men |
Olympic |
32 |
19 |
| 1960 |
400 metres Freestyle, Men |
Olympic |
40 |
25 |
| 1964 |
400 metres Freestyle, Men |
Olympic |
49 |
27 |
| 1968 |
400 metres Freestyle, Men |
Olympic |
37 |
20 |
| 1972 |
400 metres Freestyle, Men |
Olympic |
43 |
28 |
| 1976 |
400 metres Freestyle, Men |
Olympic |
47 |
29 |
| 1980 |
400 metres Freestyle, Men |
Olympic |
28 |
16 |
| 1984 |
400 metres Freestyle, Men |
Olympic |
36 |
25 |
| 1988 |
400 metres Freestyle, Men |
Olympic |
49 |
33 |
| 1992 |
400 metres Freestyle, Men |
Olympic |
46 |
31 |
| 1996 |
400 metres Freestyle, Men |
Olympic |
34 |
30 |
| 2000 |
400 metres Freestyle, Men |
Olympic |
46 |
40 |
| 2004 |
400 metres Freestyle, Men |
Olympic |
47 |
39 |
| 2008 |
400 metres Freestyle, Men |
Olympic |
36 |
26 |
| 2012 |
400 metres Freestyle, Men |
Olympic |
28 |
23 |
| 2016 |
400 metres Freestyle, Men |
Olympic |
50 |
39 |
| 2020 |
400 metres Freestyle, Men |
Olympic |
36 |
31 |