| # | Name | Team | Time | Date | Meet |
|---|---|---|---|---|---|
| 1 | Katie Ledecky |
USA | 1:54.59 | 03/06 | 2020 Pro Swim Series
Des Moines, IA |
| 2 | Junxuan Yang |
CHN | 1:54.98 | 01/19 | 2020 FINA Champions Series
Beijing, CHN |
| 3 | Siobhan Haughey |
HKG | 1:55.21 | 01/19 | 2020 FINA Champions Series
Beijing, CHN |
| 4 | Emma McKeon |
AUS | 1:55.38 | 03/15 | 2020 NSW State Open Championships
Sydney, AUS |
| 5 | Allison Schmitt |
USA | 1:56.01 | 01/17 | 2020 Pro Swim Series
Knoxville, TN |
| 6 | Freya Anderson |
GBR | 1:56.06 | 01/19 | Flanders Cup
Antwerp, BEL |
| 7 | Federica Pellegrini |
ITA | 1:56.36 | 12/14 | Italian Open LC Championships
Riccione, ITA |
| 8 | Madison Wilson |
AUS | 1:56.90 | 03/15 | 2020 NSW State Open Championships
Sydney, AUS |
| 9 | Simone Manuel |
USA | 1:56.92 | 03/06 | 2020 Pro Swim Series
Des Moines, IA |
| 10 | Brianna Throssell |
AUS | 1:56.99 | 08/03 | 2019 FINA World Cup
Tokyo, JPN |
| 11 | Charlotte Bonnet |
FRA | 1:57.41 | 01/24 | 2020 Luxembourg Euro Meet
Luxembourg, LUX |
| 12 | Rio Shirai |
JPN | 1:57.58 | 09/08 | 2019 JPN Student Champs
Tokyo, JPN |
| 13 | Femke Heemskerk |
NED | 1:57.67 | 01/19 | 2020 FINA Champions Series
Beijing, CHN |
| 14 | Erika Brown |
USA | 1:57.68 | 12/06 | 2019 Toyota U.S. Open
Atlanta, GA |
| 15 | Nagisa Ikemoto |
JPN | 1:57.77 | 02/08 | 2020 Kirara Cup
Yamaguchi, JPN |
| 16 | Melanie Margalis |
USA | 1:57.80 | 01/17 | 2020 Pro Swim Series
Knoxville, TN |
| 17 | Rebecca Smith |
CAN | 1:57.81 | 03/06 | 2020 Winter Ontario Swimming Champs
Ontario, CAN |
| 18 | Kayla Sanchez |
CAN | 1:57.91 | 01/17 | 2020 Pro Swim Series
Knoxville, TN |
| 19 | Isabel Gose |
GER | 1:57.97 | 07/26 | 2020 Madgeburg Swim Meet
Madgeburg, GER |
| 20 | Paige Madden |
USA | 1:58.09 | 12/06 | 2019 Toyota U.S. Open
Atlanta, GA |
| 21 | Leah Smith |
USA | 1:58.21 | 03/06 | 2020 Pro Swim Series
Des Moines, IA |
| 22 | Gizem Guvenc |
TUR | 1:58.24 | 03/13 | 2020 Turkish Nationals
Edirne, TUR |
| 22 | Jianjiahe Wang |
CHN | 1:58.24 | 09/04 | 2019 Chinese Nats
Anshan City, CHN |
| 24 | Valentine Dumont |
BEL | 1:58.29 | 08/13 | 2020 Sette Colli Trophy
Rome, ITA |
| 25 | Mallory Comerford |
USA | 1:58.36 | 03/06 | 2020 Pro Swim Series
Des Moines, IA |
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