Paul William Gallico was born in New York City, on 26th July, 1897. His father was an Italian, and his mother came from Austria; they emigrated to New York in 1895.
He went to school in the public schools of New York, and in 1916 went to Columbia University. He graduated in 1921 with a Bachelor of Science degree, having lost a year and a half due to World War I. He then worked for the National Board of Motion Picture Review, and after six months took a job as the motion picture critic for the New York Daily News. He was removed from this job as his "reviews were too Smart Alecky", and took refuge in the sports department.
During his stint there, he was sent to cover the training camp of Jack Dempsey, and decided to ask Dempsey if he could spar with him, to get an idea of what it was like to be hit by the world heavyweight champion. The results were spectacular; Gallico was knocked out within two minutes. But he had his story, and from there his sports-writing career never looked back.
He was a first-class fencer, and a keen deep-sea fisherman. He was married four times, and had several children.
He died in Antibes on 15th July, 1976, just short of his 79th birthday.