Swimming at the 2008 Summer Olympics – Women's 100 metre backstroke Semifinal 1 Semifinal 1

| Rank_ | Lane | Name_ | Nationality | Time_ |
|---|---|---|---|---|
| 1 | 5 | Natalie Coughlin | United States | 59.43 |
| 2 | 4 | Reiko Nakamura | Japan | 59.64 |
| 3 | 3 | Gemma Spofforth | Great Britain | 59.79 |
| 4 | 6 | Hanae Ito | Japan | 1:00.13 |
| 5 | 7 | Elizabeth Simmonds | Great Britain | 1:00.39 |
| 6 | 2 | Julia Wilkinson | Canada | 1:00.60 |
| 7 | 1 | Sophie Edington | Australia | 1:01.05 |
| 8 | 8 | Kseniya Moskvina | Russia | 1:01.06 |