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Background: The aim of the present research was to assess morphometric and volumetric measurements of bony orbit using computed tomography to define the effects of age and gender on orbital anthropometry. Method: 302 orbital cavities in 151 adult samples (18–90 years with a mean age of 43.10 ± 20.25 years) were investigated (100 males [66.2%] and 51 females [33.8%]). The samples represented no history of orbital trauma, dysplasia, or other diseases with a putative effect on orbital growth. Results: The mean orbital height for the right and left sides were 3.75 ± 0.20 and 3.74 ± 0.21 cm, respectively, while the orbital width was 3.44 ± 0.17 and 3.46 ± 0.17 cm, respectively. The mean interorbital-biorbital width was 2.26 ± 0.26 and 9.55 ± 0.41 cm, respectively. The mean OI in both genders was 108.52 ± 6.83. There was no significant difference in OI index between the genders or sides. The study population belonged to the Megaseme category. The mean right/left orbital volume (OV) of both genders was 25.20 and 24.68 cm3, respectively. OV was significantly larger in males than females (P < 0.005) and showed sexual dimorphism. There was a positive, statistically significant association of OV with the samples' age (P < 0.0001) Conclusion: The outcomes of this research showed that the CT and 3D volumetric methods represent useful baseline morphometric data for the southwestern Iranian population using a reliable technique in orbital volumetry. The obtained data can be used for the diagnosis of orbital pathologies and anthropological studies.