Final | | time | | L | -. Cyrena Samba-Mayela | France | &s | | 2 | -. Nadine Visser | Netherlands | &s | | 3 | -. Grace Stark | United States | &s | | 4 | -. Masai Russell | United States | &s | | 5 | -. Alaysha Johnson | United States | &s | | 6 | -. Jasmine Camacho-Quinn | Puerto Rico | &s | | 7 | -. Devynne Charlton | Bahamas | &s | | 8 | -. Ackera Nugent | Jamaica | &s | | 9 |
World Record: Tobi Amusan, Nigeria 12.12s Eugene, United States 24 July 2022 | Olympic Record: Jasmine Camacho-Quinn, Puerto Rico 12.26s Tokyo, Japan 1 August 2021 | World Leading: Masai Russell, United States 12.25s Eugene, United States 30 June 2024 |
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| First 2 and Best 2 times advanced to Final. |
Semi 1 | | time | | L | 1. Grace Stark | United States | 12.39s | Q | 4 | 2. Devynne Charlton | Bahamas | 12.50s | Q | 7 | 3. Tobi Amusan | Nigeria | 12.548s | | 6 | 4. Pia Skrzyszowska | Poland | 12.548s | | 8 | 5. Mariam Abdul-Rashid | Canada | 12.60s | PB | 3 | 6. Danielle Williams | Jamaica | 12.82s | | 5 | 7. Yumi Tanaka | Japan | 12.91s | | 9 | -. Ebony Morrison | Liberia | Dqs | | 2 |
Semi 2 | | time | | L | 1. Alaysha Johnson | United States | 12.34s | Q | 4 | 2. Nadine Visser | Netherlands | 12.43s | Q | 7 | 3. Charisma Taylor | Bahamas | 12.63s | PB | 8 | 4. Maribel Caicedo | Ecuador | 12.67s | | 9 | 5. Ditaji Kambundji | Switzerland | 12.68s | | 6 | 6. Sarah Lavin | Ireland | 12.69s | | 4 | 7. Janeek Brown | Jamaica | 12.92s | | 9 | 8. Lotta Harala | Finland | 13.05s | | 2 |
Semi 3 | | time | | L | 1. Jasmine Camacho-Quinn | Puerto Rico | 12.35s | Q | 5 | 2. Masai Russell | United States | 12.42s | Q | 7 | 3. Ackera Nugent | Jamaica | 12.44s | q | 4 | 4. Cyrena Samba-Mayela | France | 12.52s | q | 6 | 5. Mako Fukube | Japan | 12.89s | | 3 | 6. Marione Fourie | South Africa | 13.01s | | 9 | 7. Maayke Tjin-A-Lim | Netherlands | 13.03s | | 2 | -. Cindy Sember | Great Britain | DNF | | 8 |
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