This study aimed to examine differences in the magnitude of intra- and inter-limb asymmetry across different competitive levels (i.e., regional, national, and international) and between sexes in competitive judokas. The magnitude of intra-limb (i.e., hamstring/quadriceps ratio [H/Q]) and inter-limb (i.e., quadriceps/quadriceps ratio [Q/Q], hamstring/hamstring ratio [H/H], hamstring/quadriceps : hamstring/quadriceps ratio [H/Q:H/Q] and the percentage difference method [PDM] for knee extension and flexion) isokinetic strength asymmetry was assessed in 27 male and 20 female judokas, aged 18–59 years. No significant differences in the H/Q ratio for the left and the right leg as well as the PDM for knee extension and flexion, the H/H ratio, the Q/Q ratio, and the H/Q:H/Q ratio were found across competitive levels (p = 0.183–0.953). Similarly, no significant sex-based differences in asymmetry were observed (p = 0.439–0.983). Since most asymmetry indices did not significantly vary by competitive level or sex, and asymmetry magnitude values were generally relatively low, group-level asymmetry reduction may not be a general priority, though individual assessment remains important. Therefore, practitioners should assess limb asymmetry on an individual basis to determine if any corrective action is needed.