When William Leonard Morgan was born on 10 May 1893, in Millcreek, Salt Lake, Utah, United States, his father, William Thomas Morgan, was 22 and his mother, Esther Elizabeth Simper, was 18. He married Leona May Eddie on 30 January 1918, in Rigby, Jefferson, Idaho, United States. They were the parents of at least 3 sons and 1 daughter. He lived in Clark, Jefferson, Idaho, United States in 1930 and Clark Election Precinct, Jefferson, Idaho, United States in 1940. He died on 24 May 1952, in Rigby, Jefferson, Idaho, United States, at the age of 59, and was buried in Rigby, Jefferson, Idaho, United States.