When Eras Gardner was born on 16 September 1893, in Teton, Fremont, Idaho, United States, his father, Fredrick James Gardner, was 40 and his mother, Eliza Sedilla Bird, was 30. He married Rosetta Jeneal Jeffs on 28 January 1926. They were the parents of at least 1 daughter. He lived in Moody, Madison, Idaho, United States for about 10 years and Moody Election Precinct, Madison, Idaho, United States in 1940. He registered for military service in 1919. He died on 1 February 1967, in Boise, Ada, Idaho, United States, at the age of 73, and was buried in Teton-Newdale Cemetery, Madison, Idaho, United States.