When Owen Clinton Bagley was born on 27 October 1900, in Granville, Addison, Vermont, United States, his father, Erwin Eugene Bagley, was 22 and his mother, Bessie Maud Boyce, was 17. He married Ruby Olive Wilber on 16 November 1920, in Morrisville, Morristown, Lamoille, Vermont, United States. They were the parents of at least 3 sons and 2 daughters. He lived in East Granville, Granville, Addison, Vermont, United States in 1940. He died on 27 October 1974, in Burlington, Chittenden, Vermont, United States, at the age of 74, and was buried in Mountain View Cemetery, Essex, Chittenden, Vermont, United States.