When Otis William Sharp was born on 23 September 1910, in Marietta, Lac qui Parle, Minnesota, United States, his father, Marion Oscar Sharp, was 29 and his mother, Clara Edith Allen, was 27. He married Ella Gertrude Hanson on 5 October 1937, in Lincoln, Montana, United States. They were the parents of at least 1 son. He lived in Vermilion, Vermilion River County No. 24, Alberta, Canada in 1935 and School District 15 Cut Bank, Glacier, Montana, United States in 1940. He died on 9 October 1987, in Hamilton, Ravalli, Montana, United States, at the age of 77, and was buried in Shelby, Toole, Montana, United States.