Introduction: It is required to have a precise knowledge of dimensions of frontal sinus anatomy in relation to age side and gender to establish it’s forensic importance and application. Aim and Objectives: To study was to assess variations in frontal sinus anatomy in a given population. Material and Methods:A retrospective study was undertaken on head CTs PNS(Computed Tomography Paranasal sinuses) of 119 patients. Various parameters of frontal sinus like Antero–posterior diameter, Height, Width, Anterior wall thickness, total width and Volume were measured and compared age wise, sidewise & gender wise Result: No significant difference in parameters were seen when gender wise comparison was made. However a significant difference was observed when width of right and left side frontal sinus, total width and AP diameter (Antero posterior) of right side were compared amongst certain age groups. Conclusions: The sound knowledge of frontal sinus morphometry and variability is very useful in personal identification which applied in medico–legal issues.