# 2021 World Athletics U20 Championships – Women's 100 metres

The women's 100 metres at the 2021 World Athletics U20 Championships was held at the Kasarani Stadium on 18 and 19 August.

## Records

Standing records prior to the 2021 World Athletics U20 Championships :
| World U20 Record | Marlies Göhr (GDR) | 10.88 | Dresden, East Germany | 1 July 1977 |
| Championship Record | Twanisha Terry (USA) | 11.03 | Tampere Finland | 12 July 2018 |
| World U20 Leading | Briana Williams (JAM) | 10.97 | Miramar, United States | 5 June 2021 |

## Results
### Heats

Qualification: First 4 of each heat (Q) and the 4 fastest times (q) qualified for the semifinal.
Wind: Heat 1: +0.5 m/s, Heat 2: +0.5 m/s, Heat 3: +1.0 m/s, Heat 4: -0.1 m/s, Heat 5: -0.9 m/s
| Rank | Heat | Name | Nationality | Time | Note |
| 1 | 3 | Beatrice Masilingi | Namibia | 11.20 | Q, NU20R, NR |
| 2 | 4 | Tina Clayton | Jamaica | 11.50 | Q |
| 3 | 1 | Camille Rutherford | Bahamas | 11.59 | Q |
| 4 | 3 | Tima Seikeseye Godbless | Nigeria | 11.59 | Q |
| 5 | 2 | Praise Ofoku | Nigeria | 11.65 | Q |
| 6 | 2 | Kerrica Hill | Jamaica | 11.65 | Q |
| 7 | 1 | Maria Mihalache | Romania | 11.71 | Q |
| 8 | 5 | Ivana Ilić | Serbia | 11.75 | Q |
| 8 | 4 | Eva Kubíčková | Czech Republic | 11.75 | Q, SB |
| 10 | 1 | Lirangi Alonzo Tejada | Dominican Republic | 11.75 | Q |
| 11 | 4 | Viktória Forster | Slovakia | 11.75 | Q |
| 12 | 3 | Mélissa Gutschmidt | Switzerland | 11.80 | Q |
| 13 | 2 | Johanna Kylmänen | Finland | 11.80 | Q |
| 14 | 3 | Charlize Eilerd | South Africa | 11.84 | Q |
| 15 | 3 | Anna Pursiainen | Finland | 11.85 | q |
| 16 | 4 | Gaya Bertello | Italy | 11.86 | Q |
| 16 | 2 | Mariandreé Chacón | Guatemala | 11.86 | Q |
| 18 | 1 | Andrė Ožechauskaitė | Lithuania | 11.88 | Q |
| 19 | 5 | Leah Bertrand | Trinidad and Tobago | 11.88 | Q |
| 20 | 4 | Isabella Goudros | Canada | 11.91 | q |
| 21 | 5 | Lucie Mičunková | Czech Republic | 11.93 | Q |
| 22 | 5 | Magdalena Niemczyk | Poland | 11.98 | Q |
| 23 | 2 | Monika Romaszko | Poland | 12.00 | q |
| 24 | 4 | Medhani Batuwanage | Sri Lanka | 12.01 | q |
| 25 | 1 | Kayla La Grange | South Africa | 12.02 | |
| 26 | 2 | Simay Özçiftçi | Turkey | 12.04 | |
| 27 | 3 | Yanina Yurchenko | Ukraine | 12.05 | |
| 28 | 5 | Nemata Nikiema | Burkina Faso | 12.10 | |
| 29 | 1 | Zülha Armutçu | Turkey | 12.14 | |
| 30 | 5 | Antonella Todisco | Italy | 12.15 | |
| 31 | 1 | Boitshepiso Kelapile | Botswana | 12.16 | SB |
| 32 | 2 | Mayssa Mouawad | Lebanon | 12.19 | PB |
| 33 | 4 | Lacarthea Cooper | Bahamas | 12.30 | |
| 34 | 3 | Mercy Chebet | Kenya | 12.39 | PB |
| 35 | 5 | Charlotte Afriat | Monaco | 12.66 | |
| 36 | 3 | Sumaya Dewan | Bangladesh | 12.91 | PB |

### Semifinals

Qualification: First 2 of each heat (Q) and the 2 fastest times (q) qualified for the final.
Wind: Heat 1: 0.0 m/s, Heat 2: +0.3 m/s, Heat 3: -0.5 m/s
| Rank | Heat | Name | Nationality | Time | Note |
| 1 | 1 | Tina Clayton | Jamaica | 11.34 | Q |
| 2 | 2 | Beatrice Masilingi | Namibia | 11.35 | Q |
| 3 | 2 | Mélissa Gutschmidt | Switzerland | 11.50 | Q |
| 4 | 1 | Ivana Ilić | Serbia | 11.50 | Q |
| 5 | 2 | Viktória Forster | Slovakia | 11.54 | q, NU20R |
| 6 | 3 | Praise Ofoku | Nigeria | 11.57 | Q |
| 7 | 2 | Kerrica Hill | Jamaica | 11.60 | q |
| 8 | 2 | Tima Seikeseye Godbless | Nigeria | 11.61 | |
| 9 | 3 | Eva Kubíčková | Czech Republic | 11.64 | Q, SB |
| 10 | 1 | Maria Mihalache | Romania | 11.64 | |
| 11 | 1 | Johanna Kylmänen | Finland | 11.70 | |
| 12 | 3 | Camille Rutherford | Bahamas | 11.72 | |
| 13 | 1 | Lirangi Alonzo Tejada | Dominican Republic | 11.73 | |
| 14 | 2 | Andrė Ožechauskaitė | Lithuania | 11.79 | |
| 15 | 3 | Leah Bertrand | Trinidad and Tobago | 11.80 | |
| 16 | 3 | Isabella Goudros | Canada | 11.87 | |
| 17 | 2 | Gaya Bertello | Italy | 11.88 | |
| 18 | 1 | Lucie Mičunková | Czech Republic | 11.90 | |
| 19 | 3 | Anna Pursiainen | Finland | 11.90 | |
| 20 | 2 | Monika Romaszko | Poland | 11.91 | |
| 21 | 1 | Medhani Batuwanage | Sri Lanka | 11.96 | |
| 22 | 3 | Charlize Eilerd | South Africa | 11.97 | |
| 23 | 3 | Mariandreé Chacón | Guatemala | 11.99 | |
| 24 | 1 | Magdalena Niemczyk | Poland | 12.10 | |

### Final

The final was held on 19 August at 18:10.
Wind: -0.6 m/s
| Rank | Lane | Name | Nationality | Time | Note |
| | 5 | Tina Clayton | Jamaica | 11.09 | PB |
| | 4 | Beatrice Masilingi | Namibia | 11.39 | |
| | 7 | Mélissa Gutschmidt | Switzerland | 11.51 | |
| 4 | 6 | Praise Ofoku | Nigeria | 11.53 | |
| 5 | 9 | Ivana Ilić | Serbia | 11.54(.533) | |
| 6 | 2 | Viktória Forster | Slovakia | 11.54(.537) | NU20R |
| 7 | 3 | Kerrica Hill | Jamaica | 11.67 | |
| 8 | 8 | Eva Kubíčková | Czech Republic | 11.76 | |