This research paper analyzes the sexual dimorphism of the hard tissues in the craniofacial system. The accurate determination of the age of skeletal remains is crucial in fields such as forensic science, anthropology, and archaeology. When determining sexual dimorphism, it is necessary to make a distinction between sex and gender. Determination of sexual dimorphism exclusively refers to sex, which is biologically determined, while gender is sociologically determined. The skull, after the pelvis, is considered to be the best indicator of the sex of the remains due to the preservation of morphological characteristics. It is important to study a specific population to determine the sex of an individual, as different populations have varying skeletal characteristics. The determination of sex through examination of the skull can result in a 90% certainty of the results. Several key areas of the skull play a crucial role in determining the gender, including the nuchal line, mastoid process, supraorbitals, mandible, glabella, and mental protuberance. Once the sex of an individual is established, it becomes easier to determine their age and height. Also, the area of the skull that contributes to gender determination is the human dentition. In human dentition, sexual dimorphism is manifested in the dimensions and morphology of teeth, patterns of tooth development and eruption, and expression of the protein amelogenin in tooth enamel. Also, sexual dimorphism can be read in the anomaly of the number of teeth.