Duncan Foundation is a charitable trust based in the Rangitikei, New Zealand.
Duncan Foundation Trust was established in 1946 by Sir Thomas and Lady Duncan in response to the polio epidemic in New Zealand at that time. Known for many years as the Sir Thomas and Lady Duncan Trust, it became Duncan Foundation in December 2025.
Sir Thomas and Lady Duncan funded the investigation of treatment for polio and established a polio hospital in Silverstream Wellington (which was later relocated to Durie Hill, Wanganui). The hospital was funded by “Otiwhiti”, a sheep station located at Otairi, Hunterville in the Rangitikei which was gifted by Sir Thomas and Lady Duncan.
The Foundation continues to support people affected by polio, as well as other neuro-muscular disorders, particularly children. It also funds research into causes, treatment and prevention of neuromuscular disorders.
Duncan Foundation supported the formation of, and continues to assist cann Charitable Trust, which provides access to allied health services for people impacted by neurological conditions. These services help guide rehabilitation and provide ongoing support.
The Foundation is administered by a board of trustees, the majority of whom are direct descendants of Sir Thomas and Lady Duncan.

Sir Thomas & Lady Jeannie Duncan
A sound mind in a sound body, is a short, but full description of a happy state in this world.
John Locke (1693)
