When Missouri Pinkney Cox was born on 10 May 1861, in Troy, Lincoln, Missouri, United States, her father, James Robert Cox, was 36 and her mother, Ann Elizabeth East, was 37. She married Henry Franklin Hiler on 16 October 1881, in Troy, Lincoln, Missouri, United States. They were the parents of at least 2 sons and 3 daughters. She lived in Dry Creek Township, Howell, Missouri, United States in 1900 and Spring Creek Township, Howell, Missouri, United States for about 20 years. She died on 31 May 1940, in West Plains, Howell, Missouri, United States, at the age of 79, and was buried in Epps Cemetery, Dry Creek Township, Howell, Missouri, United States.