Benaud was born in Penrith, New South Wales, in 1930. He came from a cricket family, with his younger brother John Benaud also going on to become an Australian Test cricketer. His father Louis, a third-generation Australian of French Huguenot descent, was a leg spinner who played for Penrith District Cricket Club in Sydney Grade Cricket, gaining attention for taking all twenty wickets in a match against St. Marys for 65. Lou later moved to Parramatta region in western Sydney, and played for Cumberland. Benaud also used to live in Coraki, NSW.