World’s Fastest 100m Backstroke – Women’s Long Course

World Record: Regan Smith 57.13
Olympic Record: Kaylee McKeown 57.47
World Junior Record: Regan Smith 57.57
Commonwealth Record: Kaylee McKeown 57.33

Top 10 All-time Performers:

1. Regan Smith (27.94, 29.19) 57.13
2. Kaylee McKeown (28.15, 29.18) 57.33
3. Kylie Masse (28.07, 29.63) 57.70
4. Mollie O’Callaghan (28.17, 29.71) 57.88
5. Kathleen Baker (27.90, 30.10) 58.00
6. Katharine Berkoff (28.24, 29.77) 58.01
7. Kathleen Dawson (28.23, 29.85) 58.08
8. Gemma Spofforth (28.71, 29.41) 58.12
9. Anastasia Zueva (28.13, 30.05) 58.18
10. Emily Seebohm (28.57,29.66) 58.23
11. Claire Curzan (28.25, 30.04) 58.29

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The chart below compares the World’s fastest 100m Backstroke swimmers. Swimmers and coaches can looks at the individual Splits, Stroke Counts and the first 50m split compared to swimmers 50m PB. All swim data has been collected from our team reviewing race footage where possible.

Woman's 100m Backstroke Long Course

Women's 100m Backstroke - Long Course
	Regan Smith	Kaylee McKeown	Kylie Masse	Mollie O'Callaghan	Kathleen Baker	Katharine Berkoff	Kathleen Dawson	Gemma Spofforth	Anastasia Zueva	Emily Seebohm	Claire Curzan
Height:	5ft 7in 1.70m	5ft 9in 1.75m	5ft 8in 1.72m	5ft 8in 1.73m	5ft 8in 1.73m		5ft 8in 1.72m	6ft 1in 1.86m	6ft 1.83m	6ft 1.83m
Weight:	121lb 55kg	132lb 60kg	134lb 61kg	130lb 59kg	149lb 68kg		141lb 64kg	161lb 73kg	154lb 70kg	141lb 64kg
Country:	USA	AUS	Canada	AUS	USA	USA	Great Britian	Great Britian	Russia	AUS	USA
DOB:	2002-02-09	2001-07-12	1996-01-18	2004-04-02	1997-02-28	2001-01-28	1997-10-03	1987-11-17	1990-05-08	1992-06-05	2004-06-30
Meet:	2024 U.S. Olympic Trials	Swimming World Cup - Budapest Oct 2023	Canadian Olympic Trials 2021	2024 Australian Swimming Trials	2018 USA Summer Nationals	2023 U.S. Nationals Finals	2021 European Championships	13th FINA World Championships 2009	13th FINA World Championships 2009	Olympic Games London 2012	World Aquatics Championships Doha 2024
1st 50m Split
Strokes	35	35	35		35		33	32	34	33
Split Time:	27.94	28.15	28.07	28.17	27.90	28.24	28.23	28.71	28.13	28.57	28.25
50m PB:	27.74	26.86	27.64	28.17	27.48	27.12	27.92	27.92	27.90	27.37	28.09
Time off 50m PB:	0.20	1.29	0.43	0.00	0.42	1.12	0.31	0.79	0.23	1.20	0.16
Percentage of 50m PB:	100.721%	104.803%	101.556%	100.000%	101.528%	104.130%	101.110%	102.830%	100.824%	104.384%	100.570%
2nd 50m Split
Strokes	38	37	38		42		37	37	40	38
Split Time:	29.19	29.18	29.63	29.71	30.10	29.77	29.85	29.41	30.05	29.66	30.04
Total Time:	57.13	57.33	57.70	57.88	58.00	58.01	58.08	58.12	58.18	58.23	58.29

Here is Regan Smith’s New World Record swim to view.

Here is Emma McKeown’s Previous 100m Backstroke World Record swim to view.

Here is a look at the Women’s 200m Backstroke Long Course All Time Rankings.

The swimming world has seen some remarkable performances in the women’s 100m backstroke, marked by outstanding records and top performances. The current World Record is held by Regan Smith with a time of 57.13 seconds, achieved with split times of 27.94 seconds for the first 50 meters and 29.19 seconds for the second 50 meters. This record showcases Smith’s exceptional speed and endurance.

The Olympic Record is held by Kaylee McKeown, who clocked 57.47 seconds, slightly slower than Smith’s world record. McKeown’s performance, however, remains formidable, especially considering her Commonwealth Record of 57.33 seconds, which she achieved with split times of 28.15 seconds and 29.18 seconds.

In the realm of junior swimmers, Regan Smith also holds the World Junior Record with a time of 57.57 seconds, demonstrating her prowess from an early age. Her split times for this record were 27.94 seconds and 29.63 seconds, indicative of her consistent performance across different stages of her career.

Examining the top 10 all-time performers provides further insight into the competitive nature of this event. Kaylee McKeown’s 57.33 seconds stands out among these performances, followed by Kylie Masse’s 57.70 seconds, achieved with split times of 28.07 and 29.63 seconds. Mollie O’Callaghan’s 57.88 seconds and Kathleen Baker’s 58.00 seconds are also notable, with Baker recording a particularly fast first 50 meters at 27.90 seconds.

Katharine Berkoff (58.01), Kathleen Dawson (58.08), and Gemma Spofforth (58.12) all follow closely, each demonstrating exceptional skill and speed. Anastasia Zueva’s 58.18 seconds and Emily Seebohm’s 58.23 seconds highlight the depth of talent in this event, while Claire Curzan’s 58.29 seconds rounds out the top 10.

These times reflect not only the individual athletic excellence of these swimmers but also the evolution and competitiveness of the women’s 100m backstroke over the years. The split times provide a detailed look at how these athletes distribute their effort across the race, with slight variations highlighting different strategies and strengths.

Note: World’s Fastest 100m Backstroke – Women’s Long Course – Update June 2024