Sir Humphrey Francis O'Leary KCMG QC (12 February 1886 – 16 October 1953) was the seventh Chief Justice of New Zealand, from 1946 to 1953.

Born in Redwoodtown in the Wairau Valley, Marlborough, in 1886, his father, an Irish immigrant, was a blacksmith who had migrated to Masterton.

From that time, although he remained faithful to the Catholic religion, Humphrey O'Leary attended state schools.

There his academic ability, outgoing personality and sporting prowess made him a popular student.

The Queen's Scholarship also paid for three years at university and he enrolled in 1902 to study law at Victoria College.