By his will he left considerable sums to episcopal societies, besides legacies to his relatives. Harris had married, 20 May 1837, Katherine Lucia, youngest daughter of Sir Edward O'Brien, 4th Baronet. She died at Bremhill vicarage 31 January 1865. By her he had an only son, James Edward Harris, who died in childhood. Harris was the author of "One Rule and One Mind", a sermon, 1841.