The women's 100 metre butterfly event at the 2010 FINA World Swimming Championships (25 m) took place 18 December – 19 December. The heats and semifinals were held on 18 December. The final was held on 19 December.

Records

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

	Name	Nation	Time	Location	Date
World record	Diane Bui Duyet Diane Bui Duyet Diane Bui Duyet, sometimes spelled "Bui-Duyet", is a French/New Caledonian swimmer. Due to the New Caledonia's status as an overseas territory of France, Bui Duyet competes for New Caledonia in regional competitions and for France in continental and above competitions .In...		55.05	Istanbul Istanbul Istanbul , historically known as Byzantium and Constantinople , is the largest city of Turkey. Istanbul metropolitan province had 13.26 million people living in it as of December, 2010, which is 18% of Turkey's population and the 3rd largest metropolitan area in Europe after London and...	12 December 2009
Championship record	Felicity Galvez Felicity Galvez Felicity Madeline Galvez OAM is an Australian swimmer and two time Olympic gold medalist from Melbourne, Victoria. She was educated at Runnymede College, in Madrid.- Career :...		55.89	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...	13 April 2008

The following records were established during the competition:

Date	Round	Name	Nation	Time	WR	CR
19 December 2010	Final	Felicity Galvez Felicity Galvez Felicity Madeline Galvez OAM is an Australian swimmer and two time Olympic gold medalist from Melbourne, Victoria. She was educated at Runnymede College, in Madrid.- Career :...		55.43		CR

Heats

61 swimmers participated in 8 heats, qualified swimmers are listed:

Rank	Heat	Lane	Name	Time	Notes
1	6	4		56.69	Q
2	7	4		56.72	Q
3	7	5		56.89	Q
4	7	3		56.90	Q
4	8	5		56.90	Q
6	1	6		56.98	Q
7	7	6		57.14	Q
8	8	4		57.15	Q
9	6	3		57.40	Q
10	8	6		57.68	Q
11	1	2		58.02	Q
12	7	7		58.05	Q
13	6	7		58.16	Q
14	6	8		58.21
15	7	8		58.31	Q
16	8	2		58.33	Q
17	6	5		58.57	Q

Semifinal 1

Rank	Lane	Name	Time	Notes
1	6		55.99	Q
2	5		56.55	Q
3	3		56.63	Q
4	4		57.00	Q
5	2		57.31
6	7		58.19
7	8		58.65
8	1		58.72

Semifinal 2

Rank	Lane	Name	Time	Notes
1	5		56.19	Q
2	3		56.74	Q
3	4		56.85	Q
4	7		56.99	Q
5	2		57.18
6	6		57.22
7	1		57.87
8	8		58.11

Final

Rank	Lane	Name	Time	Notes
	5		55.43	CR
	4		55.73
	8		56.25
4	6		56.61
5	1		56.62
6	2		56.67
7	3		56.98
8	7		57.46

External links

• 2010 FINA World Swimming Championships (25 m): Women's 100 m butterfly entry list, from OmegaTiming.com; retrieved 2010-12-16.