Abstract: Reeve, TC and Tyler, CJ. The validity of the smartjump contact mat. J Strength Cond Res 27(6): 1597–1601, 2013—The aim of this study was to establish the criterion validity of the SmartJump contact mat in assessing vertical jump height (VJH) and peak power (PP). Twenty-three participants (15 men, age = 26 ± 6 years; 8 women, age = 26 ± 9 years) completed a maximal effort vertical jump using 3 different jump types (countermovement jump [CMJ], countermovement with arms [CMJA], and squat jump [SJ]). Data were simultaneously collected on both the contact mat and force platform. Vertical jump height was calculated using the time in air (TIA) method with both force platform (TIAplatform) and contact mat (TIAmat) data and the takeoff velocity (TOV) method using the force platform (TOVplatform) data. Peak power was calculated using a validated equation. The results showed that VJH and PP calculated using the TIAmat method were significantly greater than that calculated from the TIAplatform and TOVplatform methods for all jump types (VJH: p < 0.001, PP: p < 0.001). The results from this study show clear discrepancies between apparatus and calculation methods that may have implications for practitioners and should be considered when assessing VJH and PP in the field.