The women's 100 metre freestyle event at the 2010 FINA World Swimming Championships (25 m) took place 16 December – 17 December. The heats and semifinals were held on 16 December. The final was held on 17 December.

Records

Prior to the competition, the existing world and championship records were as follows.

	Name	Nation	Time	Location	Date
World record	Libby Trickett		51.01	Hobart Hobart Hobart is the state capital and most populous city of the Australian island state of Tasmania. Founded in 1804 as a penal colony,Hobart is Australia's second oldest capital city after Sydney. In 2009, the city had a greater area population of approximately 212,019. A resident of Hobart is known as...	10 August 2009
Championship record	Marleen Veldhuis Marleen Veldhuis Magdalena Johanna Maria Veldhuis is a professional swimmer from the Netherlands. She is world record holder in 4 events . Veldhuis has won 6 world championships gold medals and 20 European championships gold medals... Therese Alshammar Therese Alshammar Malin Therese Alshammar is a Swedish swimmer who has won three Olympic medals, 25 World Championship medals, and 43 European Championship medals. Standing at 1.80 m, she is a specialist of short races in freestyle and butterfly...		52.17	Manchester Manchester Manchester is a city and metropolitan borough in Greater Manchester, England. According to the Office for National Statistics, the 2010 mid-year population estimate for Manchester was 498,800. Manchester lies within one of the UK's largest metropolitan areas, the metropolitan county of Greater... Athens Athens Athens , is the capital and largest city of Greece. Athens dominates the Attica region and is one of the world's oldest cities, as its recorded history spans around 3,400 years. Classical Athens was a powerful city-state...	11 April 2008 16 April 2000

The following records were established during the competition:

Date	Round	Name	Nation	Time	WR	CR
17 December 2010	Final	Ranomi Kromowidjojo Ranomi Kromowidjojo Ranomi Kromowidjojo is a Dutch swimmer who mainly specializes in freestyle but also has potential in backstroke and butterfly events. As part of the Dutch team, she holds the world records in the 4×50 m and 4×200 m freestyle relays on short course , and 4×100 m freestyle relay on long course...		51.44		CR

Heats

89 swimmers participated in 12 heats, qualified swimmers are listed:

Rank	Heat	Lane	Name	Time	Notes
1	11	2		52.27	Q
2	12	4		52.39	Q
3	11	5		52.58	Q
4	10	4		52.62	Q
5	12	6		52.85	Q
6	12	2		53.14	Q
7	10	6		53.23	Q
8	11	4		53.31
9	12	3		53.32	Q
10	11	6		53.33	Q
11	10	5		53.50	Q
12	12	5		53.53	Q
13	11	3		53.59	Q
14	12	7		53.85	Q
15	9	6		53.89	Q
16	10	1		53.94	Q
17	11	4		53.97
18	8	4		54.17	Q

Ottesen withdrew before the semifinals, with Seppälä being the substitute who also withdrew. Therefore Pang advances to the semi-finals with the 18th fastest time.

Semifinal 1

Rank	Lane	Name	Time	Notes
1	5		52.27	Q
2	4		52.34	Q
3	3		52.76	Q NR
4	6		52.90	Q
5	7		53.03	Q
6	2		53.33
7	8		53.68
8	1		53.76

Semifinal 2

Rank	Lane	Name	Time	Notes
1	4		52.51	Q
2	5		52.67	Q
3	6		52.95	Q
4	3		53.09
5	2		53.30
6	1		53.49
7	7		53.60
7	8		53.60

Final

Rank	Lane	Name	Time	Notes
	5		51.45	CR
	4		52.18
	3		52.25
4	7		52.41
5	2		52.51	NR
6	1		52.81
7	6		52.95
8	8		53.10

External links

• 2010 FINA World Swimming Championships (25 m): Women's 100 m freestyle entry list, from OmegaTiming.com; retrieved 2010-12-14.