Ian Anthony Trewhella, AM[1] (20 May 1945 – 29 November 2024) was an Australian Paralympic medallist in athletics and archery, who won four medals at two Paralaympics.

[3] He was an advocate for people with a disability in Canberra and surrounding regions, having served on the boards and committees of many disability-related organisations.

He provided advice to health professions and families on people living with quadriplegia.

[2] In 1992, he became a Member of the Order of Australia due to volunteer service to people with disabilities in the fields of sport, recreation and welfare.

[4] Trewhella used a variety of aids and strategies to hold the recurve bow and arrow.