The purpose of this study was to profile the preseason body composition of high school wrestlers as a function of age and body weight. The preseason body composition characteristics of 121 high school wrestlers were analyzed according to age (15, 16 and 17 years old) and body weight (43.36 to 86.71 kg). Each age group was further divided into lightweights (Lwt: 43.36 to 63.56 kg) and heavyweights (Hwt: 64.01 to 86.71 kg). The 15-year-old Lwts demonstrated less fat-free weight (FFW) than 16- and 17-year-old Lwts, while Hwts demonstrated similar body composition characteristics across all ages. These results indicate subtle differences in body composition characteristic across narrow age ranges in the Lwt categories of high school wrestlers. The less FFW of the younger and lighter wrestlers could lead to erroneous decisions in the selection of a safe minimal wrestling weight for this age group.