When John Mead Hyatt was born in November 1887, in Kansas, United States, his father, Jonathan John Gilbert Hyatt, was 31 and his mother, Mary Bell Miller, was 29. He married Iva Virginia Fleshman. They were the parents of at least 4 sons and 2 daughters. He lived in Green Township, Platte, Missouri, United States in 1900. He died on 5 October 1969, at the age of 81.