Thaisa Erwin (born 22 August 1980 in Aberdeen, United Kingdom) is a British born Australian equestrian athlete.

In July 2024, Erwin was selected by the Australian Equestrian Federation to represent the Australian team at the 2024 Summer Olympics in Paris, France.

[2] Erwin was born in Aberdeen, but grew up in Russia and Australia.

She lives and works in Middleburg, Virginia, United States where she runs her equestrian business.

[3] This biographical article related to Australian equestrianism is a stub.