Abstract Person-specific three-dimensional computational modelling plays a vital role in modern day research of cochlear implants to assist in understanding the neural interface of the cochlea and implanted electrode array. Further improvements are made to these models as more parameters are included. Landmark assessment provides information and is frequently used to register co-ordinates for model generation as it captures small variations. Objectives: The objective of this study is to identify and define landmarks to describe the internal auditory canal adequately for inclusion in the three-dimensional computational models of the cochlea and its surrounding structures. Participants: Retrospectively collected computer tomography scans of live human cochleae were collected. Descriptive and comparative statistics were used to describe the data obtained from the scans. Results: The mean anterior-posterior (AP) diameter at the base on the basal turn, the AP diameter at the midpoint of the IAC, the anterior and posterior length of the internal acoustic canal were measured. 57.14% of the internal acoustic canals observed presented with a cylindrical, 40.48% was funnel-shaped and 2.38 % was bud-shaped. A statistically significant difference was found between the diameters of the male and female internal acoustic meatii. Conclusion: This paper serves as a reference providing a landmark set for the description of the internal acoustic canal for inclusion in three-dimensional computational reconstruction of the cochlea and surrounding structures.