Craniometric geometry of Nigeria skulls is an original work aimed at addressing the information gap in the anthropometry of Nigerian skulls. At least nineteen primary parameters and other various craniometric indices including two new parameters namely orishasterion triangle and iniorish index in male and female skulls were determined. There was evidence of sexual dimorphism in Nigerian skulls even with the orishasterion triangle and iniorish index. This will be a handy tool to forensic experts with respect to determination of sexes and races and also to surgeons in the face of surgical interventions.