When Grace Leona Thompson was born on 28 September 1907, in La Crosse, La Crosse, Wisconsin, United States, her father, Christian Alfred Thompson, was 34 and her mother, Anna Marie Fjeld Nelson, was 32. She married Laird LeMoyne Johnston Sr on 26 October 1964, in Blackfoot, Bingham, Idaho, United States. She died on 25 January 1997, at the age of 89, and was buried in Rose Hill Cemetery, Bonneville, Idaho, United States.