| 2009 FINA World Championships | ||
|---|---|---|
| Diving | ||
| Individual | ||
| 1 m | men | women |
| 3 m | men | women |
| 10 m | men | women |
| Synchronised | ||
| 3 m | men | women |
| 10 m | men | women |
| Open water swimming | ||
| 5 km | men | women |
| 10 km | men | women |
| 25 km | men | women |
| Swimming | ||
| Freestyle | ||
| 50 m | men | women |
| 100 m | men | women |
| 200 m | men | women |
| 400 m | men | women |
| 800 m | men | women |
| 1500 m | men | women |
| Backstroke | ||
| 50 m | men | women |
| 100 m | men | women |
| 200 m | men | women |
| Breaststroke | ||
| 50 m | men | women |
| 100 m | men | women |
| 200 m | men | women |
| Butterfly | ||
| 50 m | men | women |
| 100 m | men | women |
| 200 m | men | women |
| Individual medley | ||
| 200 m | men | women |
| 400 m | men | women |
| Freestyle relay | ||
| 4×100 m | men | women |
| 4×200 m | men | women |
| Medley relay | ||
| 4×100 m | men | women |
| Synchronised swimming | ||
| Solo | ||
| Technical | women | |
| Free | women | |
| Duet | ||
| Technical | women | |
| Free | women | |
| Team | ||
| Technical | women | |
| Free | women | |
| Combination | women | |
| Water polo | ||
| Tournament | men | women |
The Women's 400 m Freestyle race at the 2009 World Championships was held on 26 July at the Foro Italico in Rome, Italy.
| World record |  Federica Pellegrini (ITA) | 4:00.41 | Pescara, Italy | 27 June 2009 |
| Championship record |  Laure Manaudou (FRA) | 4:02.61 | Melbourne, Australia | 25 March 2007 |
The following records were established during the competition:
| Date | Round | Name | Nationality | Time | Record |
|---|---|---|---|---|---|
| 26 July | Heat 6 | Federica Pellegrini | Italy | 4:01.96 | CR |
| 26 July | Final | Federica Pellegrini | Italy | 3:59.15 | WR |
| Rank | Name | Nationality | Lane | Time | Notes |
|---|---|---|---|---|---|
 | Federica Pellegrini | Italy | 4 | 3:59.15 | WR |
 | Joanne Jackson |  Great Britain | 3 | 4:00.60 | NR |
 | Rebecca Adlington | Great Britain | 8 | 4:00.79 | |
| 4 | Allison Schmitt |  United States | 5 | 4:02.51 | |
| 5 | Coralie Balmy | France | 6 | 4:03.29 | |
| 6 | Camelia Potec |  Romania | 2 | 4:03.41 | NR |
| 7 | Ophélie-Cyrielle Étienne | France | 7 | 4:04.54 | |
| 8 | Lotte Friis |  Denmark | 1 | 4:07.62 |
|
The women's 400 metre freestyle at the 2007 World Aquatics Championships took place on 25 March at Rod Laver Arena in Melbourne, Australia.
The first world record in the men's 400 metres freestyle in long course (50 metres) swimming was recognised by the International Swimming Federation (FINA) in 1908. In the short course (25 metres) swimming events the world's governing body recognizes world records since 3 March 1991.
Mireia Belmonte García is a Spanish Olympic, world, and European champion swimmer. She is the world record holder in the short course 200 metre butterfly and 400 metre individual medley. Formerly, she held the world record in the short course 400 metre freestyle, 800 metre freestyle, and 1500 metre freestyle. She was the first Spanish woman to win a gold medal in swimming at an Olympic Games and is widely considered to be the greatest Spanish swimmer of all time.
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The Women's 400m Individual Medley (IM) at the 2007 World Aquatics Championships took place on 1 April at the Rod Laver Arena in Melbourne, Australia. As the event was over 200 meters in length, no semifinals were held in it and the top 8 swimmers from the preliminary heats advance directly to the single final heat. 40 swimmers were entered in the event, of which 48 swam.
The Women's 4 × 200 m Freestyle Relay at the 2007 World Aquatics Championships took place on 29 March 2007 at the Rod Laver Arena in Melbourne, Australia. The top-12 finishers from this race qualified for the event at the 2008 Olympics. 25 teams were entered in the event; all swam.
The men's 400 metre individual medley (IM) at the 2007 World Aquatics Championships took place on 1 April at the Rod Laver Arena in Melbourne, Australia. As the event was over 400 meters in length, no semifinals were held in it and the top 8 swimmers from the preliminary heats advance directly to the single final heat. 50 swimmers were entered in the event, of which 49 swam.
The men's 100 m freestyle at the 2009 World Championships took place on 29 July and the evening of 30 July (finals) at the Foro Italico in Rome, Italy.
The heats for the women's 200 m freestyle race at the 2009 World Championships took place in the morning and evening of 28 July and the final took place in the evening session of 29 July at the Foro Italico in Rome, Italy.
The heats for the Women's 1500 m Freestyle race at the 2009 World Championships took place on the morning of 27 July and the final was held in the evening session of 28 July at the Foro Italico in Rome, Italy.
The men's 400 metre freestyle at the 2005 World Aquatics Championships took place on 24 July in the Olympic pool at Parc Jean-Drapeau in Montreal, Canada. 57 swimmers were entered and in the event in the preliminary heats, the top-8 of which advanced on to swim again in the final heat that event.
The men's 100 metre freestyle at the 2005 World Aquatics Championships occurred on 27 July and in the evening of 28 July (final) in the Olympic pool at Parc Jean-Drapeau in Montreal, Canada. 131 swimmers were entered in the event, of which 124 swam in one of 17 preliminary heats. The top-16 swimmers from the heats advanced on to semifinals; the top-8 swimmers in the two semifinals heats advanced onto the next night's final.
The Women's 200 Freestyle at the 11th FINA World Aquatics Championships was swum 26 and 27 July 2005 in Montreal, Quebec, Canada. On 26 July, preliminary heats and semifinals occurred, and on 27 July a final heat was swum in the evening. 64 swimmers were entered in the event, of which 62 swam in one of 8 heats. The top-16 swimmers from the preliminary heats advanced on to semifinals; the top-8 swimmers in the two semifinals heats advanced onto the next night's final.
Li Bingjie is a Chinese swimmer. She is the world record holder in the short course 400 metre freestyle. She is also the Asian record holder in the long course 400 metre freestyle as well as the short course 1500 metre freestyle. She is the 2021 World Short Course champion in the 400 metre freestyle and 800 metre freestyle. At the 2020 Summer Olympics, she won a gold medal in the 4×200 metre freestyle relay and a bronze medal in the 400 metre freestyle.
