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Mollie O'Callaghan

Australiab. 2004 (22)

World record swims in available results

Personal Bests

Best times from available individual swims and official relay lead-offs; career coverage may be incomplete. Select an event to show its progression.

2022 Australian Swimming Championships · Date unavailable

24.52

2023 World Aquatics Championships - Fukuoka · Date unavailable

52.08relay lead-off

2023 World Championships · 26 Jul 2023

WR1:52.85

400 Freestyle

2025 Australian Open Championships · Date unavailable

4:10.63

2024 Australian Open Championships · Date unavailable

AR27.16

2024 Australian Open Championships · Date unavailable

58.09

2022 Australian Swimming Championships · Date unavailable

2:08.48

All Results 139 swims · 19 meets

2026 Australian Open

Race dates unavailable.

50 Freestyle LCM
Final324.89
50 Freestyle LCM
Heat625.39
100 Freestyle LCM
Final152.66
100 Freestyle LCM
Heat153.26
100 Backstroke LCM
Final258.98
100 Backstroke LCM
Heat21:00.23
200 Freestyle LCM
Final11:53.69
200 Freestyle LCM
Heat11:58.23

2026 China Open Swimming Championships (50m) · Shenzhen, People's Republic of China

Race dates unavailable.

100 Freestyle LCM
Final252.80
100 Backstroke LCM
Final258.64

2025 World Aquatics Swimming World Cup · Toronto

Race dates unavailable.

50 Backstroke SCM
Final325.42
50 Backstroke SCM
Heat125.88
100 Freestyle SCM
Final250.82
100 Freestyle SCM
Heat151.54
200 Freestyle SCM
Final11:49.36
200 Freestyle SCM
Heat11:54.15

2025 World Cup

200 Freestyle SCM24 Oct 2025
——WR1:49.36
200 Freestyle SCM18 Oct 2025
——WR1:49.77

2025 World Aquatics Swimming World Cup · Westmont

Race dates unavailable.

50 Freestyle SCM
Final323.81
50 Freestyle SCM
Heat224.02
50 Backstroke SCM
Final325.72
50 Backstroke SCM
Heat125.73
100 Freestyle SCM
Final251.44
100 Freestyle SCM
Heat252.49
200 Freestyle SCM
Final11:49.77
200 Freestyle SCM
Heat11:53.88

2025 World Aquatics Swimming World Cup · Carmel

Race dates unavailable.

50 Freestyle SCM
Heat223.95
50 Freestyle SCM
Final323.96
50 Backstroke SCM
Final225.80
50 Backstroke SCM
Heat226.05
100 Freestyle SCM
Final251.13
100 Freestyle SCM
Heat151.87
200 Freestyle SCM
Final11:50.77
200 Freestyle SCM
Heat11:54.01

2025 Australian Swimming Trials

Race dates unavailable.

50 Backstroke LCM
Final227.39
50 Backstroke LCM
Heat227.72
100 Backstroke LCM
Final258.85
100 Backstroke LCM
Heat21:00.03
200 Freestyle LCM
Final11:54.43
200 Freestyle LCM
Heat21:56.67

2025 Australian Open Championships

Race dates unavailable.

50 Freestyle LCM
Final325.01
50 Freestyle LCM
Heat525.28
50 Backstroke LCM
Final227.51
50 Backstroke LCM
Heat227.82
100 Freestyle LCM
Final153.12
100 Freestyle LCM
Heat153.51
100 Backstroke LCM
Final259.23
100 Backstroke LCM
Heat21:00.48
200 Freestyle LCM
Final11:55.71
200 Freestyle LCM
Heat72:00.04
400 Freestyle LCM
Final44:10.63
400 Freestyle LCM
Heat84:14.44

2024 Olympic Games Paris

Race dates unavailable.

100 Freestyle LCM
Final452.34
100 Freestyle LCM
Semifinal152.75
100 Freestyle LCM
Heat153.27
200 Freestyle LCM
Final11:53.27
200 Freestyle LCM
Semifinal21:54.70
200 Freestyle LCM
Heat11:55.79

2024 Australian Open Championships

Race dates unavailable.

50 Freestyle LCM
Heat424.74
50 Freestyle LCM
Final524.81
50 Backstroke LCM
Final227.16
50 Backstroke LCM
Heat227.45
100 Freestyle LCM
Final152.27
100 Freestyle LCM
Heat252.94
100 Backstroke LCM
Final158.09
100 Backstroke LCM
Heat259.90
200 Freestyle LCM
Final11:53.57
200 Freestyle LCM
Heat11:56.60

2023 World Aquatics Championships - Fukuoka

Race dates unavailable.

100 Freestyle LCM
Final152.16
100 Freestyle LCM
Semifinal252.86
100 Freestyle LCM
Heat754.01
200 Freestyle LCM
Final11:52.85
200 Freestyle LCM
Semifinal31:54.91
200 Freestyle LCM
Heat11:55.68
50 Backstroke LCM
Heat—DNS

2023 World Championships

200 Freestyle LCM26 Jul 2023
——WR1:52.85

2023 Australian Swimming Trials

Race dates unavailable.

50 Freestyle LCM
Final424.64
50 Freestyle LCM
Heat625.08
100 Freestyle LCM
Final152.48
100 Freestyle LCM
Heat353.06
100 Backstroke LCM
Final258.42
100 Backstroke LCM
Heat259.68
200 Freestyle LCM
Final11:53.83
200 Freestyle LCM
Heat21:56.22

2023 Australian Swimming Championships

Race dates unavailable.

50 Freestyle LCM
Final424.99
50 Freestyle LCM
Heat425.11
50 Backstroke LCM
Final127.42
50 Backstroke LCM
Heat127.72
100 Freestyle LCM
Final152.63
100 Freestyle LCM
Heat153.52
100 Backstroke LCM
Final258.42
100 Backstroke LCM
Heat21:00.21
200 Freestyle LCM
Final11:55.15
200 Freestyle LCM
Heat11:57.85

2022 16th FINA World Swimming Championships (25m) · Melbourne

Race dates unavailable.

50 Backstroke SCM
Final325.61
50 Backstroke SCM
Semifinal325.69
50 Backstroke SCM
Heat325.99
100 Backstroke SCM
Final255.62
100 Backstroke SCM
Semifinal155.80
100 Backstroke SCM
Heat356.35

2022 19th FINA World Championships Budapest

Race dates unavailable.

100 Freestyle LCM
Final152.67
100 Freestyle LCM
Semifinal152.85
100 Freestyle LCM
Heat153.49
200 Freestyle LCM
Final21:55.22
200 Freestyle LCM
Semifinal11:56.34
200 Freestyle LCM
Heat11:57.28

2022 Australian Swimming Championships

Race dates unavailable.

50 Freestyle LCM
Final324.52
50 Freestyle LCM
Heat324.87
50 Backstroke LCM
Final127.46
50 Backstroke LCM
Heat127.80
100 Freestyle LCM
Final152.49
100 Freestyle LCM
Heat152.83
100 Backstroke LCM
Final259.12
100 Backstroke LCM
Heat21:01.16
200 Freestyle LCM
Final21:54.94
200 Freestyle LCM
Heat61:57.26
200 Backstroke LCM
Final22:08.48
200 Backstroke LCM
Heat32:13.17

2021 Australian Swimming Championships

Race dates unavailable.

50 Freestyle LCM
Bonus Final2125.00
50 Freestyle LCM
Heat625.24
50 Backstroke LCM
Bonus Final2128.08
50 Backstroke LCM
Heat328.09
100 Freestyle LCM
Heat553.78
100 Freestyle LCM
Final553.85
100 Backstroke LCM
Heat31:00.60
100 Backstroke LCM
Final41:01.33
200 Freestyle LCM
Heat51:57.65
200 Freestyle LCM
Final61:58.08
200 Backstroke LCM
Bonus Final212:12.59
200 Backstroke LCM
Heat22:14.31

2019 7th FINA World Junior Swimming Championships · Budapest

Race dates unavailable.

50 Backstroke LCM
Final427.94
50 Backstroke LCM
Heat328.24
50 Backstroke LCM
Semifinal328.33
100 Freestyle LCM
Final454.84
100 Freestyle LCM
Heat455.17
100 Freestyle LCM
Semifinal655.32
100 Backstroke LCM
Final41:00.27
100 Backstroke LCM
Semifinal31:00.29
100 Backstroke LCM
Heat21:00.53