Background Forensic age estimation is considered a prime focus of forensic anthropological analysis of living and human skeletal remains. Aim This study aimed to assess the accuracy of ultrasonography (US) in bone age estimation and to compare the predictability of age detection using ultrasound on the upper ends of the radius and ulna in a sample of Egyptian population. Patients and methods This cross-sectional study was conducted on 111 Egyptian volunteers of both sexes aged from 10 to 25 years old and subjected to the sonographic examination of the elbow joint. The volunteers were grouped into three age groups: group 1 (from 10 up to <12 years), group 2 (from 12 up to 16 years), and group 3 (> 16 up to 25 years). Results There was no statistically significant difference between both sexes concerning the age groups suggested by the stage of the epiphyseal union of the upper ends of the radius and ulna detected by US examination. The Kappa agreement test showed that there was a good agreement between the age estimated by the US examination based on the stage of the epiphyseal union of proximal ends of radius and ulna and the official age (Kappa=0.756, and 0.630, respectively). Conclusion US can be used as a suitable alternative modality for age estimation. The studied bone ends showed good agreement between the official age and the US estimated age. The proximal radius was with the highest agreement.