He married Elizabeth "Lizzie" Hunter in May 1890 at Banner, Illinois or on June 26, 1890 at York, Nebraska. Born in Augusta, Illinois, she was the daughter of John H. Hunter. Lizzie and William Hill had a daughter, Zana A. Hill. Zana attended the University of Denver and the New England Conservatory of Music. Among her travels, she was in China in 1916 and 1917 during the rise of the monarchy and war there in 1917.