Livers of 25 common garter snakes (Thamnophis sirtalis) from Minnesota (2015–16) were analyzed for heavy metals by inductively coupled plasma atomic emission spectroscopy. Dry weight mean concentrations (ranges µg/g) were arsenic, 118.94 (0.26–1245.56); cadmium, 1.44 (0.15–7.59); lead, 0.21 (<0.10–0.78); and mercury, 0.30 (<0.5–2.25).