| Olympiad | Year | Host | Countries | Competitors | Men | Women | Sports | Events |
| I | 1896 | Athens, Greece | 14 | 241 | 241 | 0 | 9 | 43 |
| II | 1900 | Paris, France | 24 | 997 | 975 | 22 | 18 | 95 |
| III | 1904 | St. Louis, United States | 12 | 651 | 645 | 6 | 17 | 91 |
| IV | 1908 | London, United Kingdom | 22 | 2008 | 1971 | 37 | 22 | 110 |
| V | 1912 | Stockholm, Sweden | 28 | 2407 | 2359 | 48 | 14 | 102 |
| VI | 1916 | Cancelled due to World War I | | | | | | |
| VII | 1920 | Antwerp, Belgium | 29 | 2626 | 2561 | 65 | 22 | 154 |
| VIII | 1924 | Paris, France | 44 | 3089 | 2954 | 135 | 17 | 126 |
| IX | 1928 | Amsterdam, Netherlands | 46 | 2883 | 2606 | 277 | 14 | 109 |
| X | 1932 | Los Angeles, United States | 37 | 1332 | 1206 | 126 | 14 | 117 |
| XI | 1936 | Berlin, Germany | 49 | 3963 | 3632 | 331 | 19 | 129 |
| XII | 1940 | Cancelled due to World War II | | | | | | |
| XIII | 1944 | Cancelled due to World War II | | | | | | |
| XIV | 1948 | London, United Kingdom | 59 | 4104 | 3714 | 390 | 17 | 136 |
| XV | 1952 | Helsinki, Finland | 69 | 4955 | 4436 | 519 | 17 | 149 |
| XVI | 1956 | Melbourne, Australia | | | | | | |
| XVII | 1960 | Rome, Italy | 83 | 5338 | 4727 | 611 | 17 | 150 |
| XVIII | 1964 | Tokyo, Japan | 93 | 5151 | 4473 | 678 | 19 | 163 |
| XIX | 1968 | Mexico City, Mexico | 112 | 5516 | 4735 | 781 | 18 | 172 |
| XX | 1972 | Munich, West Germany | 121 | 7134 | 6075 | 1059 | 21 | 195 |
| XXI | 1976 | Montreal, Canada | 92 | 6084 | 4824 | 1260 | 21 | 198 |
| XXII | 1980 | Moscow, Soviet Union | 80 | 5179 | 4064 | 1115 | 21 | 203 |
| XXIII | 1984 | Los Angeles, United States | 140 | 6829 | 5263 | 1566 | 21 | 221 |
| XXIV | 1988 | Seoul, South Korea | 159 | 8391 | 6197 | 2194 | 23 | 237 |
| XXV | 1992 | Barcelona, Spain | 169 | 9356 | 6652 | 2704 | 25 | 257 |
| XXVI | 1996 | Atlanta, United States | 197 | 10318 | 6806 | 3512 | 26 | 271 |
| XXVII | 2000 | Sydney, Australia | 199 | 10651 | 6582 | 4069 | 28 | 300 |
| XXVIII | 2004 | Athens, Greece | 201 | 10625 | 6296 | 4329 | 28 | 301 |
| XXIX | 2008 | Beijing, China | 204 | 11028 | | | 28 | 302 |
| XXX | 2012 | London, United Kingdom | TBD | TBD | TBD | TBD | TBD | TBD |