When Earl Rockwood Nixon was born on 12 April 1895, in Idaho Falls, Bonneville, Idaho, United States, his father, Thomas Alanson Nixon, was 33 and his mother, Emma Jane Catmull, was 26. He married Jane Ellen Spencer on 2 June 1926, in Salt Lake City, Salt Lake, Utah, United States. They were the parents of at least 1 son and 1 daughter. He lived in Escalante, Garfield, Utah, United States in 1930 and Iona Election Precinct, Bonneville, Idaho, United States in 1940. He died on 26 July 1985, in Milwaukee, Milwaukee, Wisconsin, United States, at the age of 90, and was buried in Iona Cemetery, Bonneville, Idaho, United States.