A method of aging pen-reared European wild hogs (Sus scrofa) was developed by using the time and order of tooth eruption and replacement. Wild hogs are born with incisors three (i3/3) and canines (c1/1). All deciduous incisors and premolars erupt by 120 days. Molars one (M1/1) and premolars (P1/1), the first permanent teeth, erupt at about 5 months. At 7 months permanent incisors three (I1/1) and canines (C1/1) replace their deciduous counterparts. Molars two (M2/2) and permanent incisors one (I1/1) are present in pigs aged 12-15 months. Temporary premolars are replaced at 14-18 months, and permanent lower incisors two (I-2) erupt at 18-22 months. Upper incisors two (I2-) and lower molars three (M-3) erupt at 21-26 months. Permanent dentition is complete with the eruption of upper molar three (M3-) at 26 months or later. Since molars three (M3/3) continue to grow as the upper and lower jaws elongate this may possibly be used as an aging technique for hogs over 26 months of age. Tooth eruption data obtained from wild trapped hogs corresponded closely with the penned hog data.