| Year | Event | Status | Participants | NOCs | 
| 1908 | 1,500 metres Freestyle, Men | Olympic | 19 | 8 | 
| 1912 | 1,500 metres Freestyle, Men | Olympic | 19 | 11 | 
| 1920 | 1,500 metres Freestyle, Men | Olympic | 24 | 13 | 
| 1924 | 1,500 metres Freestyle, Men | Olympic | 22 | 12 | 
| 1928 | 1,500 metres Freestyle, Men | Olympic | 19 | 13 | 
| 1932 | 1,500 metres Freestyle, Men | Olympic | 15 | 8 | 
| 1936 | 1,500 metres Freestyle, Men | Olympic | 21 | 10 | 
| 1948 | 1,500 metres Freestyle, Men | Olympic | 39 | 21 | 
| 1952 | 1,500 metres Freestyle, Men | Olympic | 37 | 22 | 
| 1956 | 1,500 metres Freestyle, Men | Olympic | 20 | 11 | 
| 1960 | 1,500 metres Freestyle, Men | Olympic | 30 | 19 | 
| 1964 | 1,500 metres Freestyle, Men | Olympic | 31 | 21 | 
| 1968 | 1,500 metres Freestyle, Men | Olympic | 21 | 16 | 
| 1972 | 1,500 metres Freestyle, Men | Olympic | 43 | 28 | 
| 1976 | 1,500 metres Freestyle, Men | Olympic | 31 | 20 | 
| 1980 | 1,500 metres Freestyle, Men | Olympic | 17 | 11 | 
| 1984 | 1,500 metres Freestyle, Men | Olympic | 27 | 19 | 
| 1988 | 1,500 metres Freestyle, Men | Olympic | 35 | 22 | 
| 1992 | 1,500 metres Freestyle, Men | Olympic | 30 | 24 | 
| 1996 | 1,500 metres Freestyle, Men | Olympic | 34 | 26 | 
| 2000 | 1,500 metres Freestyle, Men | Olympic | 41 | 32 | 
| 2004 | 1,500 metres Freestyle, Men | Olympic | 34 | 28 | 
| 2008 | 1,500 metres Freestyle, Men | Olympic | 35 | 27 | 
| 2012 | 1,500 metres Freestyle, Men | Olympic | 31 | 25 | 
| 2016 | 1,500 metres Freestyle, Men | Olympic | 45 | 32 | 
| 2020 | 1,500 metres Freestyle, Men | Olympic | 28 | 20 |