When Eugene Vincent Larsen was born on 31 October 1911, in Hampton, Franklin, Iowa, United States, his father, Johan Arnt Larsen, was 34 and his mother, Veronica Cecelia Cantwell, was 31. He married Mary Arlene Reynolds in 1931, in Iowa, United States. They were the parents of at least 3 sons. He registered for military service in 1944. He died on 18 December 1980, in Des Moines, Polk, Iowa, United States, at the age of 69, and was buried in Madrid, Boone, Iowa, United States.