Brian Garner Wybourne (5 March 1935 – 26 November 2003) was a New Zealand physicist known for his work on the energy levels of rare-earth ions.
Born in Morrinsville in 1935, Wybourne attended Canterbury University College, graduating with an MSc with second-class honours in 1958 and a PhD in 1960.After post-doctoral research positions at Johns Hopkins University and Argonne National Laboratory in the United States, Wybourne returned to the University of Canterbury in 1966 to take up a professorship in physics.
He served as the head of the physics department from December 1982 to November 1989.
In 1991 he was a visiting professor at the Nicholas Copernicus University in Torun, Poland, and decided to remain there permanently.He was elected a Fellow of the Royal Society of New Zealand in 1970, and the same year he won the society's Hector Medal, the highest award in New Zealand science at that time.