# Swimming at the 2009 World Aquatics Championships – Women's 4 × 100 metre freestyle relay

The women's 4×100 m freestyle relay at the 2009 World Aquatics Championships took place on July 26, 2009 at the Foro Italico in Rome, Italy.

## Records

Prior to the competition, the existing world and championship records were as follows:
| World Record | Netherlands (NED) Inge Dekker (53.77) Ranomi Kromowidjojo (53.61) Femke Heemskerk (53.62) Marleen Veldhuis (52.62) | 3:33.62 | Eindhoven, Netherlands | 18 March 2008 |
| Championship Record | Australia (AUS) Libby Lenton (53.42) Melanie Schlanger (53.95) Shayne Reese (54.90) Jodie Henry (53.21) | 3:35.48 | Melbourne, Australia | 25 March 2007 |
The following records were established during the competition:
| Date | Round | Nation | Time | Record |
| 26 July | Heat 2 | Australia Sally Foster (54.18) Marieke Guehrer (53.47) Shayne Reese (53.19) Meagen Nay (54.42) | 3:35.26 | CR |
| 26 July | Heat 3 | Germany Britta Steffen (53.76) Daniela Samulski (53.81) Petra Dallmann (53.69) Daniela Schreiber (53.48) | 3:34.74 | CR |
| 26 July | Final | Netherlands Inge Dekker (53.61) Ranomi Kromowidjojo (52.30) Femke Heemskerk (53.03) Marleen Veldhuis (52.78) | 3:31.72 | WR |

## Results
### Heats

| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 3 | 5 | Germany | Britta Steffen (53.76) Daniela Samulski (53.81) Petra Dallmann (53.69) Daniela Schreiber (53.48) | 3:34.74 | CR, NR |
| 2 | 4 | 4 | Netherlands | Femke Heemskerk (53.83) Hinkelien Schreuder (54.93) Inge Dekker (52.97) Ranomi Kromowidjojo (53.21) | 3:34.94 | |
| 3 | 2 | 4 | Australia | Sally Foster (54.18) Marieke Guehrer (53.47) Shayne Reese (53.19) Meagen Nay (54.42) | 3:35.26 | |
| 4 | 3 | 6 | Sweden | Therese Alshammar (54.27) Josefin Lillhage (53.55) Sarah Sjöström (53.14) Gabriella Fagundez (54.35) | 3:35.31 | NR |
| 5 | 4 | 5 | China | Li Zhesi (54.27) Zhu Qianwei (54.34) Tang Yi (54.03) Pang Jiaying (54.21) | 3:36.85 | |
| 6 | 4 | 3 | Great Britain | Fran Halsall (53.02) CR, NR Caitlin McClatchey (54.98) Katherine Wyld (54.80) Amy Smith (54.22) | 3:37.02 | NR |
| 7 | 3 | 4 | United States | Julia Smit (54.25) Kate Dwelley (54.65) Caitlin Geary (54.59) Christine Magnuson (53.63) | 3:37.12 | |
| 8 | 3 | 2 | Hungary | Eszter Dara (55.29) Evelyn Verrasztó (53.90) Ágnes Mutina (54.28) Katinka Hosszú (54.17) | 3:37.64 | NR |
| 9 | 3 | 3 | Canada | Victoria Poon (54.70) Erica Morningstar (54.84) Geneviève Saumur (53.89) Heather MacLean (54.79) | 3:38.22 | NR |
| 10 | 2 | 5 | France | Aurore Mongel (54.77) Hanna Shcherba (54.66) Ophelie-Cyrielle Etienne (55.44) Malia Metella (53.79) | 3:38.66 | |
| 11 | 2 | 3 | Japan | Haruka Ueda (54.88) NR Hanae Ito (55.00) Yayoi Matsumoto (54.98) Misaki Yamaguchi (54.03) | 3:38.89 | NR |
| 12 | 2 | 6 | Russia | Olga Klyuchnikova (54.88) NR Victoriya Andreeva (54.79) Maria Ugolkova (55.56) Anastasia Aksenova (55.25) | 3:40.48 | NR |
| 13 | 4 | 6 | Italy | Renata Fabiola Spagnolo (55.68) Laura Letrari (54.68) Erica Buratto (55.19) Silvia Di Pietro (55.52) | 3:41.07 | |
| 14 | 3 | 7 | Belarus | Yulia Khitraya (56.59) Aleksandra Gerasimenya (53.75) Sviatlana Khakhlova (55.44) Iryna Niafedava (56.74) | 3:42.52 | |
| 15 | 4 | 1 | Finland | Linda Laihorinne (56.63) Emilia Pikkarainen (56.50) Riia-Rosa Koskelainen (56.02) Hanna-Maria Seppälä (53.83) | 3:42.98 | |
| 16 | 2 | 7 | Slovakia | Katarina Listopadova (57.14) Katarina Filova (55.27) Miroslava Syllabova (56.44) Martina Moravcová (54.78) | 3:43.63 | |
| 17 | 2 | 0 | Belgium | Nina Van Koeckhoven (56.67) Sascha Van den Branden (56.49) Annelies de Mare (56.12) Jolien Sysmans (55.37) | 3:44.65 | NR |
| 18 | 2 | 2 | Ireland | Fiona Doyle (56.57) NR Clare Dawson (56.16) Niamh O'Sullivan (57.38) Melanie Nocher (57.10) | 3:47.21 | NR |
| 19 | 4 | 2 | Singapore | Quah Ting Wen (56.14) Amanda Lim (56.26) Mylene Ong (57.46) Lynette Lim (57.68) | 3:47.54 | |
| 20 | 3 | 1 | Bahamas | Alana Dillette (57.11) Arianna Vanderpool-Wallace (54.85) Teisha Lightbourne (58.52) Alicia Lightbourne (57.86) | 3:48.34 | NR |
| 21 | 4 | 7 | Venezuela | Arlene Semeco (55.98) Jeserick Pinto (57.83) Ximena Vilar (57.06) Yennifer Marquez (58.28) | 3:49.15 | NR |
| 22 | 1 | 5 | Ukraine | Dar'ya Stepanyuk (55.43) Oksana Serikova (56.38) Kseniya Grygorenko (59.82) Daryna Zevina (57.63) | 3:49.26 | |
| 23 | 2 | 1 | Lithuania | Rugile Mileisyte (56.94) Grite Apanaviciute (58.16) Raminta Dvariskyte (1:00.71) Aiste Dobrovolskaite (59.16) | 3:54.97 | NR |
| 24 | 4 | 9 | Malta | Nicol Cremona (1:02.14) Melinda Sue Micallef (59.71) Davina Mangion (1:00.80) Talisa Pace (1:00.34) | 4:02.99 | |
| 25 | 4 | 8 | Macau | Ma Cheok Mei (1:00.64) Tan Chi Yan (1:01.35) Fong Man Wai (1:01.07) Che Lok In (1:01.69) | 4:04.75 | |
| 26 | 3 | 8 | India | Chittaranjan Shubha (1:00.68) Murugaperumal Mercy Venpa (1:06.93) Pooja Raghava Alva (1:03.86) Talasha Prabhu (1:00.94) | 4:12.41 | |
| 27 | 2 | 8 | Senegal | Binta Zahra Diop (1:01.79) Ouleye Diallo (1:04.66) Mareme Faye (1:07.01) Khadidiatou Dieng (1:01.96) | 4:15.42 | NR |
| 28 | 1 | 4 | Mozambique | Monica Bernardo (1:03.18) Jessika Cossa (1:05.56) Faina Salate (1:04.04) Gessica Stagno (1:05.12) | 4:17.90 | |
| 29 | 4 | 0 | Albania | Sara Abdullahu (1:00.36) Reni Jani (1:09.79) Debora Keci (1:06.78) Rovena Marku (1:04.30) | 4:21.23 | |
| 30 | 3 | 0 | Pakistan | Kiran Khan (1:08.30) Aqsa Tariq (1:13.55) Rida Mitha (1:11.34) Mahnoor Moqsood (1:09.82) | 4:43.01 | |
| – | 1 | 3 | Zimbabwe | Moira Fraser (58.74) Kirsten Lapham Kimberley Eeson Nicole Horn | DSQ | |

### Final

| Rank | Lane | Nation | Swimmers | Time | Note |
| | 5 | Netherlands | Inge Dekker (53.61) Ranomi Kromowidjojo (52.30) Femke Heemskerk (53.03) Marleen Veldhuis (52.78) | 3:31.72 | WR |
| | 4 | Germany | Britta Steffen (52.22) WR Daniela Samulski (53.49) Petra Dallmann (53.75) Daniela Schreiber (52.37) | 3:31.83 | NR |
| | 3 | Australia | Lisbeth Trickett (52.62) OC Marieke Guehrer (53.60) Shayne Reese (53.25) Felicity Galvez (53.54) | 3:33.01 | OC |
| 4 | 1 | United States | Amanda Weir (54.47) Dara Torres (53.72) Christine Magnuson (53.86) Dana Vollmer (53.18) | 3:35.23 | |
| 5 | 6 | Sweden | Therese Alshammar (53.58) NR Josefin Lillhage (53.58) Sarah Sjöström (53.62) Gabriella Fagundez (54.57) | 3:35.35 | |
| 6 | 2 | China | Li Zhesi (54.04) Zhu Qianwei (53.73) Tang Yi (54.16) Pang Jiaying (53.70) | 3:35.63 | AS |
| 7 | 7 | Great Britain | Fran Halsall (53.31) Caitlin McClatchey (54.43) Katherine Wyld (54.74) Amy Smith (54.51) | 3:36.99 | NR |
| 8 | 8 | Hungary | Eszter Dara (55.09) Evelyn Verrasztó (54.20) Ágnes Mutina (54.74) Katinka Hosszú (55.50) | 3:39.53 | |