The women's 100 metre breaststroke competition of the swimming events at the 2023 Pan American Games were held on October 21, 2023, at the Aquatic Center in Santiago, Chile.

Records World record1:04.13Budapest, HungaryJuly 25, 2017Pan American Games record1:05.64Toronto, CanadaJuly 17, 2015

Results KEY:QAQualified for A finalQBQualified for B finalGRGames recordNRNational recordPBPersonal bestSBSeasonal best

Heats The first round was held on October 21. RankHeatLaneNameNationalityTimeNotes135Rachel Nicol 1:08.10QA234Macarena Ceballos 1:08.12QA314Sophie Angus 1:08.19QA443Stefanía Gómez 1:08.47QA525Emma Weber 1:09.00QA623Melissa Rodríguez 1:09.32QA724Jhennifer Conceição 1:09.75QA836Martina Barbeito 1:10.29QA922Mercedes Toledo 1:10.48QB1032Julia Sebastián 1:10.64QB1115Nichelly Lysy 1:10.81QB1216Emily Santos 1:10.92QB1326Fernanda Jiménez 1:11.36QB1433Anna Keating 1:11.42QB1512Nicole Frank 1:11.44QB1637Daysi Ramírez 1:12.92QB1727Elisa Funes 1:13.851831Antonia Cubillos 1:15.111917Sabrina Lyn 1:15.322021Astrid Caballero 1:15.922111Zaylie Thompson 1:16.752228Ana Mack 1:17.032338Paola Cwu 1:20.43

Final B The B final was also held on October 21. RankLaneNameNationalityTimeNotes 9 6Emily Santos 1:09.43 10 3Nichelly Lysy 1:10.55 11 4Mercedes Toledo 1:10.58 12 5Julia Sebastián 1:10.69 13 2Fernanda Jiménez 1:11.05 14 1Nicole Frank 1:11.60 15 7Anna Keating 1:11.73 16 8Daysi Ramírez 1:13.48

Final A The A final was also held on October 21. RankLaneNameNationalityTimeNotes 4Rachel Nicol 1:07.28 3Sophie Angus 1:07.55 5Macarena Ceballos 1:07.68 4 6Stefanía Gómez 1:07.92 NR 5 2Emma Weber 1:08.13 6 7Melissa Rodríguez 1:08.48 7 1Jhennifer Conceição 1:10.10 8 8Martina Barbeito 1:10.91

References