Swimming at the 2001 World Aquatics Championships – Women's 100 metre butterfly

Women's 100 metre butterfly at the 2001 FINA World Championships
Dates	27 July 2001 (heats, semifinals) 28 July 2001 (final)
Competitors	37
Winning time	58.27 seconds
Medalists
gold medal  Petria Thomas   Australia silver medal  Otylia Jędrzejczak   Poland bronze medal  Junko Onishi   Japan

Main article: Swimming at the 2001 World Aquatics Championships

The women's 100 metre butterfly event at the 2001 World Aquatics Championships took place 28 July. The heats and semifinals took place 27 July, with the final being held on 28 July.

Records

Prior to this competition, the existing world and competition records were as follows:

World record	Inge de Bruijn (NED)	56.61	Sydney, Australia	17 September 2000
Championship record	Jenny Thompson (USA)	58.46	Perth, Australia	15 January 1998

The following record was established during the competition:

Date	Round	Name	Nationality	Time	Record
28 July	Final	Petria Thomas	Australia	58.27	CR

Results

Heats

Rank	Name	Nationality	Time	Notes
1	Petria Thomas	Australia	58.53	Q
2	Otylia Jędrzejczak	Poland	59.24	Q
3	Junko Onishi	Japan	59.30	Q
4	Mary Descenza	United States	59.73	Q
5	Natalia Soutiaguina	Russia	59.89	Q
6	Vered Borochovski	Israel	59.94	Q
7	Irina Bespalova	Russia	59.96	Q
8	Shelly Ripple	United States	1:00.12	Q
9	Johanna Sjöberg	Sweden	1:00.35	Q
10	Sophia Skou	Denmark	1:00.53	Q
11	Fabienne Dufour	Belgium	1:00.55	Q
12	Mireia García	Spain	1:00.81	Q
13	Audrey Lacroix	Canada	1:00.84	Q
14	Ruan Yi	China	1:01.00	Q
15	Petra Zahrl	Austria	1:01.08	Q
16	Julia Ham	Australia	1:01.14	Q
17	Sara Parise	Italy	1:01.24
18	Anna Kopatchenia	Belarus	1:01.27
19	Angela San Juan	Spain	1:01.56
20	Saori Haruguchi	Japan	1:01.58
21	Jennifer Fratesi	Canada	1:01.63
22	Elizabeth Van Welie	New Zealand	1:02.69
23	Raquel Felgueiras	Portugal	1:02.77
24	Natalia Roubina	Cyprus	1:04.05
25	Christel Bouvron	Singapore	1:04.51
26	Sung Yi-Chien	Chinese Taipei	1:05.51
27	Ayse Tugce Diker	Turkey	1:05.58
28	Mariela Solange Yepez Pallo	Ecuador	1:05.80
29	Yang Chin-Kuei	Chinese Taipei	1:06.25
30	Xenavee Pangelinan	Northern Mariana Islands	1:06.66
31	Sharntelle McLean	Trinidad and Tobago	1:08.20
32	Weng Tong Cheong	Macau	1:09.07
33	Weng Lam Cheong	Macau	1:09.87
34	Nicole Hayes	Palau	1:10.51
35	Khadisa Ciss	Senegal	1:13.08
36	Xenia Peni	Papua New Guinea	1:14.21
37	Amanda Onyango	Kenya	1:21.30
–	Anna-Karin Kammerling	Sweden	DNS
–	Martina Moravcová	Slovakia	DNS
–	Inge de Bruijn	Netherlands	DNS

Semifinals

Rank	Name	Nationality	Time	Notes
1	Petria Thomas	Australia	58.59	Q
2	Otylia Jędrzejczak	Poland	58.73	Q
3	Junko Onishi	Japan	59.21	Q
4	Mary Descenza	United States	59.38	Q
5	Vered Borochovski	Israel	59.63	Q
6	Johanna Sjöberg	Sweden	59.82	Q
7	Natalia Soutiaguina	Russia	59.89	Q
8	Shelly Ripple	United States	59.96	Q
9	Sophia Skou	Denmark	1:00.15
10	Audrey Lacroix	Canada	1:00.20
11	Irina Bespalova	Russia	1:00.37
12	Mireia García	Spain	1:00.46
13	Julia Ham	Australia	1:00.62
14	Ruan Yi	China	1:00.67
15	Petra Zahrl	Austria	1:00.80
16	Fabienne Dufour	Belgium	1:01.02

Final

Rank	Name	Nationality	Time	Notes
1st place, gold medalist(s)	Petria Thomas	Australia	58.27	CR
2nd place, silver medalist(s)	Otylia Jędrzejczak	Poland	58.72
3rd place, bronze medalist(s)	Junko Onishi	Japan	58.88
4	Mary Descenza	United States	59.30
5	Johanna Sjöberg	Sweden	59.43
6	Shelly Ripple	United States	59.67
7	Vered Borochovski	Israel	59.75
8	Natalia Soutiaguina	Russia	1:00.00