Voldemort created a total of seven Horcruxes, though unintentionally, Harry Potter became an eighth Horcrux. These Horcruxes were: Tom Riddle's diary, Marvolo Gaunt's ring, Salazar Slytherin's locket, Helga Hufflepuff's cup, Rowena Ravenclaw's diadem, Nagini (his snake), and the final piece of his soul remained within himself.