On January 20, 1910, Harris married Beatrice (Trixie) Phillips. The couple had three children: Lawren P. Harris, Margaret Anne Harris, and Howard K. Harris, all born in the first decade of their marriage. Harris later fell in love with Bess, the wife of his school-time friend, F.B. Housser, but divorce was seen at the time as causing an outrage, particularly for a man as socially prominent as Harris.
