Born in London in 1901, John Collier was the son of John George and Emily Mary Noyes Collier. He had one sister, Kathleen Mars Collier. His father, John George Collier, was one of seventeen children, and could not afford formal education; he worked as a clerk. Nor could John George afford schooling for his son beyond prep school; John Collier and Kathleen were educated at home. He was privately educated by his uncle Vincent Collier, a novelist. Biographer Betty Richardson wrote: