When Harvey Marks Spears was born on 18 November 1898, in Schleicher, Texas, United States, his father, George Buchanan Spears, was 40 and his mother, Sarah Adeline Williams, was 42. He married Clote Ethleene Maclin on 17 April 1926, in Schleicher, Texas, United States. They were the parents of at least 1 daughter. He lived in Justice Precinct 1, Crockett, Texas, United States in 1930 and Commissioner's Precinct 1, Schleicher, Texas, United States in 1940. He died on 3 May 1978, in Brownwood, Brown, Texas, United States, at the age of 79, and was buried in Bangs, Brown, Texas, United States.