# Swimming at the 2010 Summer Youth Olympics – Girls' 100 metre butterfly

The women's 100 metre butterfly heats and semifinals at the 2010 Youth Olympic Games took place on August 19 with the final on August 20 at the Singapore Sports School.

## Medalists

| Gold | Liu Lan China | 59.67 |
| Silver | Judit Ignacio Spain | 1:00.07 |
| Bronze | Rachael Kelly Great Britain | 1:00.26 |

## Heats
### Heat 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | Erika Torrellas | Venezuela | 1:01.72 | Q |
| 2 | 4 | Katarina Listopadova | Slovakia | 1:02.12 | Q |
| 3 | 5 | So Lizar | Puerto Rico | 1:03.90 | |

### Heat 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Eleanoe Faulkner | Great Britain | 1:05.78 | |
| 2 | 3 | Khadeja Phillip | Trinidad and Tobago | 1:06.35 | |
| 3 | 6 | Lara Butler | Cayman Islands | 1:07.59 | |
| 4 | 5 | Gessica Stagno | Mozambique | 1:10.46 | |
| 5 | 2 | Sonie Akter | Bangladesh | 1:14.52 | |
| 6 | 7 | Surennyam Erdenebileg | Mongolia | | DSQ |

### Heat 3

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Rachael Kelly | Great Britain | 1:01.30 | Q |
| 2 | 3 | Katja Hajdinjak | Slovenia | 1:02.06 | Q |
| 3 | 8 | Patarawadee Kittiya | Thailand | 1:02.60 | |
| 4 | 2 | Danielle Villars | Switzerland | 1:02.80 | |
| 5 | 5 | Anna Schegoleva | Cyprus | 1:02.92 | |
| 6 | 6 | Bruna Rocha | Brazil | 1:03.07 | |
| 7 | 7 | Diana Ambrus | Hungary | 1:04.14 | |
| 8 | 1 | Bryndis Run Hansen | Iceland | 1:05.56 | |

### Heat 4

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | Judit Ignacio | Spain | 1:00.93 | Q |
| 2 | 4 | Liu Lan | China | 1:01.24 | Q |
| 3 | 7 | Lovisa Eriksson | Sweden | 1:01.24 | Q |
| 4 | 6 | Alessia Polieri | Italy | 1:01.49 | Q |
| 5 | 5 | Anna Marti | Spain | 1:02.12 | Q |
| 6 | 2 | Noora Laukkanen | Finland | 1:02.30 | Q |
| 7 | 8 | Katarina Simonovic | Serbia | 1:05.49 | |
| 8 | 1 | Arhatha Magavi | India | 1:09.35 | |

### Heat 5

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | Lindsay Delmar | Canada | 1:00.69 | Q |
| 2 | 3 | Elena di Liddo | Italy | 1:00.98 | Q |
| 3 | 2 | Kristina Kochetkova | Russia | 1:01.08 | Q |
| 4 | 8 | Thi Kim Tuyen Nguyen | Vietnam | 1:01.40 | Q |
| 5 | 4 | Lena Kalla | Germany | 1:01.71 | Q |
| 6 | 5 | Zoe Johnson | Australia | 1:02.31 | Q |
| 7 | 7 | Mayuko Okada | Japan | 1:03.75 | |
| 8 | 8 | Jasmine Alkhaldi | Philippines | 1:04.41 | |

## Semifinals
### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Judit Ignacio | Spain | 1:00.87 | Q |
| 2 | 5 | Kristina Kochetkova | Russia | 1:00.99 | Q |
| 3 | 7 | Katarina Listopadova | Slovakia | 1:01.27 | Q |
| 4 | 3 | Rachael Kelly | Great Britain | 1:01.30 | Q |
| 5 | 6 | Alessia Polieri | Italy | 1:01.44 | |
| 6 | 2 | Erika Torrellas | Venezuela | 1:01.78 | |
| 7 | 1 | Noora Laukkanen | Finland | 1:02.33 | |
| | 8 | Patarawadee Kittiya | Thailand | | DNS |

### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | Liu Lan | China | 1:00.28 | Q |
| 2 | 4 | Lindsay Delmar | Canada | 1:00.62 | Q |
| 3 | 5 | Elena di Liddo | Italy | 1:00.95 | Q |
| 4 | 1 | Anna Marti | Spain | 1:01.41 | Q |
| 5 | 7 | Katja Hajdinjak | Slovenia | 1:01.50 | |
| 6 | 6 | Thi Kim Tuyen Nguyen | Vietnam | 1:01.56 | |
| 7 | 2 | Lena Kalla | Germany | 1:01.94 | |
| 8 | 8 | Zoe Johnson | Australia | 1:02.24 | |

## Final

| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Liu Lan | China | 59.67 | |
| | 3 | Judit Ignacio | Spain | 1:00.07 | |
| | 1 | Rachael Kelly | Great Britain | 1:00.26 | |
| 4 | 7 | Katarina Listopadova | Slovakia | 1:00.35 | |
| 5 | 5 | Lindsay Delmar | Canada | 1:00.37 | |
| 6 | 2 | Kristina Kochetkova | Russia | 1:01.04 | |
| 7 | 8 | Anna Marti | Spain | 1:01.38 | |
| | 6 | Elena di Liddo | Italy | | DSQ |