When Leslie Mearl Parkinson was born on 19 October 1900, in Beaver, Beaver, Utah, United States, his father, Reuben Parkinson, was 36 and his mother, Zina Diantha Brown, was 30. He married Annie Arleen Unthank Millett on 5 April 1928, in Salt Lake City, Salt Lake, Utah, United States. They were the parents of at least 2 daughters. He died on 8 September 1980, in Inglewood, Los Angeles, California, United States, at the age of 79, and was buried in Inglewood Park Cemetery, Inglewood, Los Angeles, California, United States.