Zinc (Zn) is an essential nutrient involved in many metabolic functions. The NRC requirement for growing pigs is 100 mg Zn/kg, but nutritional practices vary greatly worldwide. The objective of this study was to conduct a meta-analysis to determine the response of growing-finishing pigs to traits relevant to dietary Zn concentration and to estimate a requirement. Studies that included at least three dietary Zn concentrations that did not exceed 1200 mg Zn/kg were first selected. Studies that included phytase were excluded. Then, a linear regression was applied to each study to select the studies that presented a dose-response of the parameters of interest. In total, 13 studies were selected for average daily gain (ADG), 11 for average daily feed intake (ADFI), and 24 for plasma Zn concentration. Two non-linear models were used to estimate the response, and the data were normalized (relative to the largest Y value) to capture differences among studies. The type of model strongly influenced the estimated requirement. The concentrations required to maximize ADG, ADFI, and plasma Zn concentration were 58, 52, and 86 mg Zn/kg diet, respectively, using the linearplateau model and 80, 64, and 114 mg Zn/kg, respectively, using the quadratic-plateau model. The maximum concentration of 114 mg Zn/kg is higher than the requirement estimated by the NRC but lower than the maximum authorized dose in Europe (150 mg Zn/kg).