| Women's 100 metre freestyle at the 2025 SEA Games | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Venue | SAT Swimming Pool | |||||||||
| Date | 12 December | |||||||||
| Competitors | 15 from 8 nations | |||||||||
| Winning time | 54.82 | |||||||||
| Medalists | ||||||||||
| ||||||||||
The Women's 100 metre freestyle event at the 2025 SEA Games took place on 12 December 2025 at the SAT Swimming Pool in Bangkok, Thailand.
All times are Indochina Standard Time (UTC+07:00)
| Date | Time | Event |
|---|---|---|
| Friday, 12 December 2025 | 9:00 | Heats |
| 18:00 | Final |
Prior to this competition, the existing world, Asian and Games records were as follows.
| World Record |  Sarah Sjöström (SWE) | 51.71 | Budapest, Hungary | 23 July 2017 |
| Asian Record |  Siobhan Haughey (HKG) | 52.02 | Berlin, Germany | 8 October 2023 |
| Games Record |  Quah Ting Wen (SGP) | 54.74 | Capas, Philippines | 4 December 2019 |
| Rank | Heat | Lane | Swimmer | Nationality | Time | Notes |
|---|---|---|---|---|---|---|
| 1 | 1 | 4 | Heather White |  Philippines | 55.89 | Q |
| 2 | 3 | 4 | Kayla Sanchez | Philippines | 56.00 | Q |
| 3 | 3 | 5 | Nguyễn Thúy Hiền |  Vietnam | 57.40 | Q |
| 4 | 3 | 3 | Phạm Thị Vân | Vietnam | 57.45 | Q |
| 4 | 2 | 3 | Nadia Aisha Nurazmi |  Indonesia | 57.53 | Q |
| 6 | 1 | 3 | Maria Nedelko |  Thailand | 57.84 | Q |
| 7 | 1 | 5 | Ashley Yi Xuan Lim | Singapore | 58.53 | Q |
| 8 | 1 | 4 | Quah Ting Wen | Singapore | 58.59 | Q |
| 9 | 3 | 6 | Serenna Karmelita Muslim | Indonesia | 58.92 | R |
| 10 | 2 | 6 | Wong Shi Qi |  Malaysia | 59.64 | R |
| 11 | 2 | 7 | Ariana Dirkzwager |  Laos | 59.94 | |
| 12 | 1 | 6 | Lynna Yi Jing Yeow | Malaysia | 1:00.10 | |
| 13 | 2 | 2 | Oo Nan Honey |  Myanmar | 1:02.69 | |
| 14 | 3 | 2 | Thakhin Aung Phyo Thet | Myanmar | 1:10.61 | |
| 15 | 1 | 2 | Thipthida Chantha | Laos | 1:11.96 |
| Rank | Lane | Swimmer | Nationality | Time | Notes |
|---|---|---|---|---|---|
 | 5 | Kayla Sanchez | Philippines | 54.82 | |
 | 4 | Heather White | Philippines | 55.36 | |
 | 1 | Quah Ting Wen | Singapore | 55.60 | |
| 4 | 3 | Nguyễn Thúy Hiền | Vietnam | 56.06 | |
| 5 | 2 | Nadia Aisha Nurazmi | Indonesia | 56.50 | |
| 6 | 6 | Phạm Thị Vân | Vietnam | 57.25 | |
| 7 | 7 | Ashley Yi Xuan Lim | Singapore | 57.69 | |
| 8 | 8 | Serenna Karmelita Muslim | Indonesia | 58.30 |