| | Event type
Flyweight (≤51 kilograms), Girls
| Date | 15 – 18 October 2018 | |
|---|---|---|
| Status | YOG | |
| Location | Oceania Pavilion, Parque Olímpico de la Juventud, Villa Soldati, Buenos Aires | |
| Participants | 7 from 7 countries | |
| Format | Single elimination tournament. | |
| Pos | Competitor | NOC | |||
|---|---|---|---|---|---|
| 1 | Martina La Piana |  ITA | Gold | ||
| 2 | Adijat Gbadamosi |  NGR | Silver | ||
| 3 | Heaven Garcia |  USA | Bronze | ||
| 4 | Goryana Stoeva |  BUL | |||
| =5 | Khursandoy Kholmatova |  UZB | |||
| =5 | Zhansaya Abdraimova |  KAZ | |||
| =5 | Jyoti Gulia |  IND |
Round One
| Date | 15 October 2018 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 15 Oct | Adijat Gbadamosi | NGR | ||||
| Match #2 | 15 Oct | Goryana Stoeva | BUL | Decision | Khursandoy Kholmatova | UZB | |
| Match #3 | 15 Oct | Heaven Garcia | USA | Decision | Zhansaya Abdraimova | KAZ | |
| Match #4 | 15 Oct | Martina La Piana | ITA | Decision | Jyoti Gulia | IND |
Semi-Finals
| Date | 16 October 2018 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 16 Oct | Adijat Gbadamosi | NGR | Decision | Goryana Stoeva | BUL | |
| Match #2 | 16 Oct | Martina La Piana | ITA | Decision | Heaven Garcia | USA |
Final Round
| Date | 18 October 2018 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match 1/2 | 18 Oct | Martina La Piana | ITA | Decision | Adijat Gbadamosi | NGR | |
| Match 3/4 | 18 Oct | Heaven Garcia | USA | Decision | Goryana Stoeva | BUL |