When Henry Clay Leaverton was born on 15 March 1885, in Nebraska, United States, his father, Solomon Archer Leaverton, was 26 and his mother, Flora Catherine Garoutte, was 25. He married Rose May George on 30 October 1916, in Red Lodge, Carbon, Montana, United States. They were the parents of at least 1 daughter. He lived in Perrydale, Jackson, Oregon, United States in 1930 and Election Precinct 12 Applegate, Jackson, Oregon, United States in 1940. He died on 20 January 1966, in San Luis Obispo, California, United States, at the age of 80, and was buried in Arroyo Grande, San Luis Obispo, California, United States.