When Milton Hale Thatcher was born on 23 May 1891, in Preston, Franklin, Idaho, United States, his father, Milton Herbert Thatcher, was 25 and his mother, Hattie Vilate Hale, was 18. He married Amelia Ann Bradbury on 28 May 1915, in Boise, Ada, Idaho, United States. They were the parents of at least 2 sons and 1 daughter. He lived in Boise, Idaho, United States in 1935 and Preston Election Precinct 4, Franklin, Idaho, United States in 1940. He died on 29 May 1988, in Pocatello, Bannock, Idaho, United States, at the age of 97, and was buried in Preston Cemetery, Preston, Franklin, Idaho, United States.