# 2010 FINA World Swimming Championships (25 m) – Women's 100 metre butterfly

The Women's 100 Butterfly at the 10th FINA World Swimming Championships (25m) took place 18–19 December 2010 in Dubai, United Arab Emirates. The heats and semifinals were swum 18 December; the final on 19 December.
61 individuals swam the event.

## Records

Prior to the competition, the existing world and championship records were as follows.
| | Name | Nation | Time | Location | Date |
| World record | Diane Bui Duyet | France | 55.05 | Istanbul | 12 December 2009 |
| Championship record | Felicity Galvez | Australia | 55.89 | Manchester | 13 April 2008 |
The following records were established during the competition:
| Date | Round | Name | Nation | Time | WR | CR |
| 19 December 2010 | Final | Felicity Galvez | Australia | 55.43 | | CR |

## Results
### Heats

| Rank | Heat | Lane | Name | Time | Notes |
| 1 | 6 | 4 | Inge Dekker (NED) | 56.69 | Q |
| 2 | 7 | 4 | Dana Vollmer (USA) | 56.72 | Q |
| 3 | 7 | 5 | Felicity Galvez (AUS) | 56.89 | Q |
| 4 | 7 | 3 | Christine Magnuson (USA) | 56.90 | Q |
| 4 | 8 | 5 | Jeanette Ottesen (DEN) | 56.90 | Q |
| 6 | 1 | 6 | Liu Zige (CHN) | 56.98 | Q |
| 7 | 7 | 6 | Amit Ivri (ISR) | 57.14 | Q |
| 8 | 8 | 4 | Therese Alshammar (SWE) | 57.15 | Q |
| 9 | 6 | 3 | Jemma Lowe (GBR) | 57.40 | Q |
| 10 | 8 | 6 | Sarah Sjöström (SWE) | 57.68 | Q |
| 11 | 1 | 2 | Lu Ying (CHN) | 58.02 | Q |
| 12 | 7 | 7 | Alessia Polieri (ITA) | 58.05 | Q |
| 13 | 6 | 7 | Katerine Savard (CAN) | 58.16 | Q |
| 14 | 6 | 8 | Arianna Vanderpool-Wallace (BAH) | 58.21 | Q |
| 15 | 7 | 8 | Sara Oliveira (POR) | 58.31 | Q |
| 16 | 8 | 2 | Sze Hang Yu (HKG) | 58.33 | Q |
| 17 | 6 | 5 | Ingvild Snildal (NOR) | 58.57 | |
| 18 | 5 | 2 | Mélanie Henique (FRA) | 58.58 | |
| 19 | 8 | 3 | Eszter Dara (HUN) | 58.68 | |
| 20 | 8 | 1 | Annika Saarnak (EST) | 58.70 | |
| 21 | 5 | 5 | Audrey Lacroix (CAN) | 58.73 | |
| 22 | 6 | 2 | Zsuzsanna Jakabos (HUN) | 58.82 | |
| 23 | 6 | 1 | Iris Rosenberger (TUR) | 59.03 | |
| 24 | 8 | 7 | Mandy Loots (RSA) | 59.05 | |
| 25 | 7 | 1 | Melanie Schweiger (SUI) | 59.07 | |
| 26 | 7 | 2 | Caterina Giacchetti (ITA) | 59.27 | |
| 27 | 5 | 6 | Katja Hajdinjak (SLO) | 59.45 | |
| 28 | 5 | 4 | Katarina Listopadova (SVK) | 59.63 | |
| 29 | 5 | 3 | Hiroko Sugino (JPN) | 59.67 | |
| 30 | 5 | 7 | Svetlana Fedulova (RUS) | 59.74 | |
| 31 | 6 | 6 | Chen Wan-Jung (TPE) | 59.91 | |
| 32 | 8 | 8 | Daniele de Jesus (BRA) | 1:00.28 | |
| 33 | 4 | 5 | Lisa Zaiser (AUT) | 1:00.29 | |
| 34 | 4 | 4 | Martina van Berkel (SUI) | 1:00.39 | |
| 35 | 4 | 6 | Erika Torrellas (VEN) | 1:00.59 | |
| 36 | 4 | 8 | Meagan Lim (SIN) | 1:01.23 | |
| 37 | 5 | 8 | Jasmin Rosenberger (TUR) | 1:01.29 | |
| 38 | 4 | 3 | Elimar Barrios (VEN) | 1:01.30 | |
| 39 | 5 | 1 | Ting Sheng-Yo (TPE) | 1:01.70 | |
| 40 | 4 | 2 | Diana Luna Sánchez (MEX) | 1:01.94 | |
| 41 | 3 | 6 | Patarawadee Kittiya (THA) | 1:02.01 | |
| 42 | 4 | 7 | Farida Osman (EGY) | 1:02.15 | |
| 43 | 3 | 4 | Oriele Alejandra Espinoza (PER) | 1:02.55 | |
| 44 | 3 | 7 | Marie Laura Meza (CRC) | 1:03.18 | |
| 45 | 3 | 8 | Karen Torrez (BOL) | 1:03.21 | NR |
| 46 | 3 | 5 | Ma Cheok Mei (MAC) | 1:04.12 | |
| 47 | 3 | 2 | Sherazade Amanda Ramond (MAR) | 1:05.24 | |
| 48 | 3 | 1 | Davina Mangion (MLT) | 1:06.97 | |
| 49 | 2 | 4 | Dalia Torrez (NCA) | 1:07.19 | |
| 50 | 1 | 7 | Ri Hyon Gyong (PRK) | 1:07.74 | |
| 51 | 2 | 5 | Carolina Alejandra Aguilar (PER) | 1:07.87 | |
| 52 | 2 | 6 | Emily Chan Chee (MRI) | 1:08.34 | |
| 53 | 2 | 2 | Tieri Erasito (FIJ) | 1:08.42 | |
| 54 | 2 | 3 | Shannon Austin (SEY) | 1:08.51 | |
| 55 | 3 | 3 | Kiran Khan (PAK) | 1:08.96 | |
| 56 | 2 | 7 | Judith Ilan Meauri (PNG) | 1:11.21 | |
| 57 | 2 | 8 | Anham Salyani (KEN) | 1:14.89 | |
| 58 | 1 | 4 | Soraya Oruya (KEN) | 1:16.83 | |
| 59 | 2 | 1 | Ann-Marie Hepler (MHL) | 1:19.06 | |
| - | 1 | 3 | Gouri Jayesh Kumar Kotecha (TAN) | DNS | |
| - | 4 | 1 | Monica Waage Johannessen (NOR) | DNS | |

### Semifinals

Semifinal 1
| Rank | Lane | Name | Time | Notes |
| 1 | 6 | Therese Alshammar (SWE) | 55.99 | Q |
| 2 | 5 | Christine Magnuson (USA) | 56.55 | Q |
| 3 | 3 | Liu Zige (CHN) | 56.63 | Q |
| 4 | 4 | Dana Vollmer (USA) | 57.00 | Q |
| 5 | 2 | Sarah Sjöström (SWE) | 57.31 | |
| 6 | 7 | Alessia Polieri (ITA) | 58.19 | |
| 7 | 8 | Ingvild Snildal (NOR) | 58.65 | |
| 8 | 1 | Sara Oliveira (POR) | 58.72 | |
Semifinal 2
| Rank | Lane | Name | Time | Notes |
| 1 | 5 | Felicity Galvez (AUS) | 56.19 | Q |
| 2 | 3 | Jeanette Ottesen (DEN) | 56.74 | Q |
| 3 | 4 | Inge Dekker (NED) | 56.85 | Q |
| 4 | 7 | Lu Ying (CHN) | 56.99 | Q |
| 5 | 2 | Jemma Lowe (GBR) | 57.18 | |
| 6 | 6 | Amit Ivri (ISR) | 57.22 | |
| 7 | 1 | Katerine Savard (CAN) | 57.87 | |
| 8 | 8 | Sze Hang Yu (HKG) | 58.11 | |

### Final

| Rank | Lane | Name | Time | Notes |
| | 5 | Felicity Galvez (AUS) | 55.43 | CR |
| | 4 | Therese Alshammar (SWE) | 55.73 | |
| | 8 | Dana Vollmer (USA) | 56.25 | |
| 4 | 6 | Liu Zige (CHN) | 56.61 | |
| 5 | 1 | Lu Ying (CHN) | 56.62 | |
| 6 | 2 | Jeanette Ottesen (DEN) | 56.67 | |
| 7 | 3 | Christine Magnuson (USA) | 56.98 | |
| 8 | 7 | Inge Dekker (NED) | 57.46 | |