| Swimming – Women's 400 metre freestyle at the 2015 SEA Games | ||||||||||
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| Venue | OCBC Aquatic Centre | |||||||||
| Date | 10 June 2015 | |||||||||
| Competitors | 11 from 7 nations | |||||||||
| Medalists | ||||||||||
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The women's 400 metre freestyle competition of the swimming event at the 2015 SEA Games was held on 10 June at the OCBC Aquatic Centre in Kallang, Singapore. [1]
Prior to this competition, the existing Asian and Games records were as follows:
| Asian Record |  Chen Qian (CHN) | 4:02.35 | Jinan, China | 18 October 2009 |
| Games Record |  Khoo Cai Lin (MAS) | 4:10.75 | Vientiane, Laos | 11 December 2009 |
The following records were established during the competition:
| Date | Event | Name | Nationality | Time | Record |
|---|---|---|---|---|---|
| 10 June | Final | Nguyễn Thị Ánh Viên |  Vietnam (VIE) | 4:08.66 | GR |
All times are Singapore Standard Time (UTC+08:00)
| Date | Time | Event |
|---|---|---|
| Wednesday, 10 June 2015 | 09:22 | Heat 1 |
| 09:26 | Heat 2 | |
| 19:58 | Final |
| KEY: | Q | Qualified | GR | Games record | NR | National record | PB | Personal best | SB | Seasonal best | WD | Withdrew | DNF | Did not finish |
The heats were held on 10 June.
Heat 1 was held on 10 June.
| Rank | Lane | Athletes | Time | Notes |
|---|---|---|---|---|
| 1 | 3 |  Christie May Chue Mun Ee (SIN) | 4:24.51 | Q |
| 2 | 4 |  Benjaporn Sriphanomthorn (THA) | 4:24.85 | Q |
| 3 | 6 | Ammiga Himathongkom (THA) | 4:25.03 | Q |
| 4 | 5 | Tseng Wei Wen Rachel (SIN) | 4:25.06 | Q |
| 5 | 2 | Angela Chieng Chui Fei (MAS) | 4:30.91 | Q |
| 6 | 7 |  Oo Shun Lei Maw (MYA) | 4:52.83 |
Heat 2 was held on 10 June.
| Rank | Lane | Athletes | Time | Notes |
|---|---|---|---|---|
| 1 | 4 | Nguyễn Thị Ánh Viên (VIE) | 4:24.83 | Q |
| 2 | 5 | Khoo Cai Lin (MAS) | 4:27.17 | Q |
| 2 | 3 |  Raina Saumi Graha Ramadhani (INA) | 4:30.31 | Q |
| 4 | 7 | Sagita Putri Krisdewanti (INA) | 4:32.03 | |
| 5 | 6 |  Rosalee Mira Santa Ana (PHI) | 4:33.19 |
The final was held on 10 June.
| Rank | Lane | Athletes | Time | Notes |
|---|---|---|---|---|
 | 5 | Nguyễn Thị Ánh Viên (VIE) | 4:08.66 | GR |
 | 7 | Khoo Cai Lin (MAS) | 4:17.79 | |
 | 6 | Ammiga Himathongkom (THA) | 4:20.20 | |
| 4 | 4 | Christie May Chue Mun Ee (SIN) | 4:23.69 | |
| 5 | 2 | Tseng Wei Wen Rachel (SIN) | 4:24.99 | |
| 6 | 1 | Raina Saumi Graha Ramadhani (INA) | 4:27.12 | |
| 7 | 3 | Benjaporn Sriphanomthorn (THA) | 4:27.48 | |
| 8 | 8 | Angela Chieng Chui Fei (MAS) | 4:31.05 |
