Sir Scott Duncan Macfarlane KNZM is a New Zealand paediatric oncologist.

[1] Macfarlane studied medicine at the University of Auckland, graduating MB ChB in 1977.

[2] He undertook further training in Melbourne, and began his paediatrics career at Waikato Hospital in 1986.

[1][3] He was particularly involved in the establishment of the National Child Cancer Network in 2011, heading the body until retiring in November 2021.

[1] In the 2024 New Year Honours, Macfarlane was appointed a Knight Companion of the New Zealand Order of Merit, for services to health.