When Frank Thomas Harris was born on 23 February 1892, in Justice Precinct 8, Johnson, Texas, United States, his father, John Franklin Harris, was 33 and his mother, Katie Bell White, was 23. He married Rosa Lee Williams on 15 June 1918. They were the parents of at least 2 sons and 2 daughters. He lived in Granbury, Hood, Texas, United States in 1935 and Justice Precinct 1, Hood, Texas, United States in 1940. He registered for military service in 1919. He died on 7 January 1971, in Fort Worth, Tarrant, Texas, United States, at the age of 78, and was buried in Granbury, Hood, Texas, United States.