# 2010 FINA World Swimming Championships (25 m) – Women's 50 metre butterfly

The women's 50-metre butterfly event at the 10th FINA World Swimming Championships (25m) took place 16–17 December 2010 in Dubai, United Arab Emirates. The heats and semifinals were swum 16 December; the final on 17 December.
75 swimmers swam the race.

## Records

Prior to the competition, the existing world and championship records were as follows.
| | Name | Nation | Time | Location | Date |
| World record | Therese Alshammar | Sweden | 24.38 | Singapore | 22 November 2009 |
| Championship record | Felicity Galvez | Australia | 25.32 | Manchester | 11 April 2008 |
The following records were established during the competition:
| Date | Round | Name | Nation | Time | CR |
| 16 December 2010 | Heats | Therese Alshammar | Sweden | 25.23 | CR |
| 16 December 2010 | Semifinals | Felicity Galvez | Australia | 25.20 | CR |
| 16 December 2010 | Semifinals | Therese Alshammar | Sweden | 25.19 | CR |
| 17 December 2010 | Final | Therese Alshammar | Sweden | 24.87 | CR |

## Results
### Preliminary heats

| Rank | Heat | Lane | Name | Time | Notes |
| 1 | 9 | 5 | Therese Alshammar (SWE) | 25.23 | Q, CR |
| 2 | 10 | 3 | Felicity Galvez (AUS) | 25.41 | Q |
| 3 | 10 | 4 | Inge Dekker (NED) | 25.67 | Q |
| 4 | 8 | 5 | Triin Aljand (EST) | 25.69 | Q |
| 5 | 10 | 2 | Christine Magnuson (USA) | 25.76 | Q |
| 6 | 10 | 5 | Jeanette Ottesen (DEN) | 25.77 | Q |
| 7 | 8 | 3 | Dana Vollmer (USA) | 25.83 | Q |
| 8 | 9 | 4 | Hinkelien Schreuder (NED) | 25.97 | Q$^*$ |
| 9 | 9 | 3 | Amit Ivry (ISR) | 26.17 | Q |
| 10 | 1 | 5 | Lu Ying (CHN) | 26.22 | Q |
| 11 | 8 | 6 | Marieke Guehrer (AUS) | 26.26 | Q |
| 12 | 10 | 6 | Mélanie Henique (FRA) | 26.29 | Q |
| 13 | 10 | 1 | Sze Hang Yu (HKG) | 26.33 | Q |
| 14 | 8 | 4 | Ingvild Snildal (NOR) | 26.36 | Q |
| 15 | 10 | 7 | Arianna Vanderpool-Wallace (BAH) | 26.39 | Q |
| 16 | 8 | 1 | Katerine Savard (CAN) | 26.48 | Q |
| 17 | 10 | 8 | Melanie Schweiger (SUI) | 26.54 | $^*$ |
| 18 | 2 | 8 | Guo Fan (CHN) | 26.65 | |
| 19 | 9 | 6 | Annika Saarnak (EST) | 26.69 | |
| 20 | 9 | 7 | Daniele de Jesus (BRA) | 26.73 | |
| 21 | 6 | 7 | Chanelle van Wyk (RSA) | 26.75 | |
| 22 | 8 | 8 | Sara Oliveira (POR) | 26.78 | |
| 23 | 8 | 2 | Eszter Dara (HUN) | 26.81 | |
| 24 | 9 | 2 | Fabienne Nadarajah (AUT) | 26.87 | |
| 25 | 9 | 8 | Mandy Loots (RSA) | 26.99 | |
| 26 | 7 | 5 | Katarina Listopadova (SVK) | 27.01 | |
| 27 | 9 | 1 | Svetlana Fedulova (RUS) | 27.02 | |
| 28 | 7 | 3 | Katarina Milly (SVK) | 27.07 | |
| 29 | 7 | 2 | Iris Rosenberger (TUR) | 27.09 | |
| 30 | 7 | 4 | Katja Hajdinjak (SLO) | 27.12 | |
| 31 | 8 | 7 | Alana Kathryn Dillette (BAH) | 27.17 | |
| 32 | 7 | 7 | Jeserik Pinto (VEN) | 27.36 | |
| 33 | 7 | 1 | Farida Osman (EGY) | 27.48 | |
| 34 | 7 | 6 | Cheng Wan-Jung (TPE) | 27.72 | |
| 34 | 7 | 8 | Monica Johannessen (NOR) | 27.72 | |
| 36 | 6 | 4 | Cecilia Bertoncello (ARG) | 28.02 | |
| 37 | 6 | 5 | Hiroko Sugino (JPN) | 28.15 | |
| 38 | 6 | 2 | Elimar Barrios (VEN) | 28.32 | |
| 39 | 6 | 3 | Jasmin Rosenberger (TUR) | 28.37 | |
| 40 | 5 | 6 | Diana Luna Sánchez (MEX) | 28.95 | |
| 41 | 6 | 6 | Ma Cheok Mei (MAC) | 28.96 | |
| 42 | 5 | 4 | Marie Laura Meza (CRC) | 29.20 | |
| 43 | 4 | 3 | Karen Torrez (BOL) | 29.30 | NR |
| 44 | 5 | 3 | Talita Baqlah (JOR) | 29.66 | |
| 45 | 5 | 5 | Dalia Torrez (NCA) | 29.67 | |
| 46 | 5 | 1 | Nicola Muscat (MLT) | 29.77 | |
| 47 | 5 | 7 | Silvie Ketelaars (AHO) | 29.93 | |
| 48 | 4 | 4 | Massie Milagros Carrillo (PER) | 29.99 | |
| 49 | 5 | 8 | Talisa Pace (MLT) | 30.04 | |
| 50 | 4 | 8 | Sylvia Brunlehner (KEN) | 30.16 | |
| 51 | 3 | 7 | Kiran Khan (PAK) | 30.28 | |
| 52 | 5 | 2 | Emily Chan Chee (MRI) | 30.37 | |
| 53 | 4 | 7 | Cheyenne Rova (FIJ) | 30.65 | |
| 54 | 4 | 2 | Reshika Udugampola (SRI) | 30.77 | |
| 55 | 6 | 8 | Talasha Satish Prabhu (IND) | 30.85 | |
| 56 | 4 | 5 | Shannon Austin (SEY) | 30.96 | |
| 57 | 1 | 3 | Ri Hyon Gyong (PRK) | 30.97 | |
| 58 | 3 | 6 | Tieri Erasito (FIJ) | 31.13 | |
| 59 | 3 | 4 | Danielle Bernadine Findlay (ZAM) | 31.33 | |
| 59 | 3 | 5 | Judith Ilan Meauri (PNG) | 31.33 | |
| 61 | 4 | 1 | Ann-Marie Hepler (MHL) | 31.55 | |
| 62 | 4 | 6 | Elaine Reyes (GIB) | 31.78 | |
| 63 | 3 | 3 | Michelle Ysrael (GUM) | 31.99 | |
| 64 | 6 | 1 | Bayan Jumah (SYR) | 32.31 | |
| 65 | 3 | 1 | Soraya Oruya (KEN) | 32.97 | |
| 66 | 2 | 7 | Celeste Brown (COK) | 33.17 | |
| 67 | 2 | 3 | Patricia Cani (ALB) | 33.48 | |
| 68 | 2 | 1 | Debra Daniel (FSM) | 33.52 | |
| 69 | 3 | 2 | Zenina Cruz (GUM) | 33.53 | |
| 70 | 2 | 4 | Mariam Foum (TAN) | 33.80 | |
| 71 | 3 | 8 | Britany van Lange (GUY) | 35.29 | |
| 72 | 2 | 5 | Grace Kimball (NMI) | 36.04 | |
| 73 | 1 | 4 | Katerina Izmaylova (TJK) | 36.73 | |
| 74 | 2 | 6 | Shajan Aminath (MDV) | 38.79 | |
| 75 | 2 | 2 | Keanna Villagomez (NMI) | 39.14 | |
$^*$ Schreuder scratched the semifinals; therefore 17th-place finisher Schweiger advanced to the semifinals.

### Semifinals

Semifinal 1
| Rank | Lane | Name | Time | Notes |
| 1 | 4 | Felicity Galvez (AUS) | 25.20 | Q, CR |
| 2 | 3 | Jeanette Ottesen (DEN) | 25.53 | Q |
| 3 | 5 | Triin Aljand (EST) | 25.54 | Q |
| 4 | 2 | Marieke Guehrer (AUS) | 25.76 | Q |
| 5 | 6 | Amit Ivry (ISR) | 26.05 | |
| 6 | 1 | Arianna Vanderpool-Wallace (BAH) | 26.36 | |
| 7 | 7 | Sze Hang Yu (HKG) | 26.46 | |
| 8 | 8 | Melanie Schweiger (SUI) | 26.58 | |
Semifinal 2
| Rank | Lane | Name | Time | Notes |
| 1 | 4 | Therese Alshammar (SWE) | 25.19 | Q, CR |
| 2 | 2 | Lu Ying (CHN) | 25.41 | Q |
| 3 | 5 | Inge Dekker (NED) | 25.45 | Q |
| 4 | 3 | Christine Magnuson (USA) | 25.65 | Q |
| 5 | 6 | Dana Vollmer (USA) | 25.84 | |
| 6 | 7 | Mélaine Henique (FRA) | 25.91 | |
| 7 | 1 | Ingvild Snildal (NOR) | 26.21 | |
| 8 | 8 | Katerine Savard (CAN) | 26.49 | |

### Final

| Rank | Lane | Name | Time | Notes |
| | 4 | Therese Alshammar (SWE) | 24.87 | CR |
| | 5 | Felicity Galvez (AUS) | 24.90 | |
| | 2 | Jeanette Ottesen (DEN) | 25.24 | |
| 4 | 3 | Lu Ying (CHN) | 25.34 | |
| 5 | 6 | Inge Dekker (NED) | 25.48 | |
| 6 | 7 | Triin Aljand (EST) | 25.61 | |
| 7 | 1 | Christine Magnuson (USA) | 25.74 | |
| 8 | 8 | Marieke Guehrer (AUS) | 25.96 | |