The aim of this research was to determine the morphometry of the proximal radius in a Chilean population, by means of measurements made in head of radius, neck of radius and radial tuberosity, and to compare them according to sex. A cross- sectional study was conducted analyzing Computed Tomography scans (CT) of elbows, performed between January 2014 and December 2018. Thirty-two CT corresponding to 16 men and 16 women were included. The formatted images were transferred to the RadiAnt software in order to perform measurements in the proximal radius. The statistical analysis of the results was performed using the SPSS 22 software. The diameter of the head of radius in men ranged between 22.8 +/- 1.3 and 25.0 +/- 1.7 mm; in women it ranged between 19.4 +/- 1.4 and 20.7 +/- 1.4 mm. The diameter of the proximal neck of radius in men ranged between 14.0 +/- 0.8 and 15.6 +/- 0.7 mm; in women, it ranged between 11.7 +/- 0.8 and 13.3 +/- 1.3 mm. The diameter of the distal neck of radius in men ranged between 14.4 +/- 1.0 and 16.0 +/- 1.2 mm; in women, it ranged between 12.5 +/- 1.0 and 13.8 +/- 1.5 mm. The diameter of radial tuberosty in men ranged between 15.1 +/- 1.5 and 17.7 +/- 1.8 mm; in women, it ranged between 13.2 +/- 1.1 and 15.5 +/- 1.8 mm. The mean height of the head of radius was 11.2 +/- 1.2 mm in men and 9.5 +/- 0.8 mm in women. Statistically significant sex differences were revealed in all the preceding measurements. The mean height of the neck of radius was 11.2 +/- 1.2 mm in men and 10.1 +/- 1.6 mm in women, with no significant difference (p=0.15). The average values of morphometry of the proximal radius of the Chilean population differ from those describing the European population, and show some similarities with the Chinese population. Our results may be useful to design of implants and prostheses for the proximal radius, and to correct surgical planning in orthopedics and traumatology.