|Full name||Hayley Gloria Palmer|
|Born||8 May 1989|
|Height||1.71 m (5 ft 7 1⁄2 in)|
|Weight||72 kg (159 lb)|
Palmer was born in Cheltenham, England. However, both her parents are New Zealand nationals and they returned to New Zealand for two years when Palmer was young, before moving back to Cheltenham when she was 3. In Cheltenham, Palmer attended St Edwards School, and grammar school at the High School for Girls, where she currently holds every school record in swimming. Palmer began swimming in England, before her return to New Zealand in 2007.
Her coach for the majority of her swimming career in England was Graham Brookhouse. During her early teenage years she was a member of the Gloucester City Swimming Club. She currently swims for North Shore Swimming in Auckland, and is coached by Randy Reese at Clearwater Aquatics in Florida.
Palmer is a Latter-day Saint.
She competed for New Zealand at the 2008 Summer Olympics in the Women's 4 × 200 m freestyle relay.
In the 2009 13th Fina World Swimming Championships she made the Semi-Finals of the 100m Freestyle and placed 11th.
Palmer currently holds the following New Zealand Records:
- Women's Long Course 50m Freestyle (25.01)
- Women's Long Course 100m Freestyle (53.91)
- Women's Short Course 50m Freestyle (24.39)
- Women's Short Course 100m Freestyle (53.57)
- Women's Short Course 100m Individual Medley (1:01.24)