The viscosity of five [(0.27, 0.58, 0.92, 1.73, and 2.63) mol.kg(-1)] binary aqueous SrCl2 solutions has been measured with a capillary flow technique. Measurements were made at pressures up to 20 MPa. The range of temperature was (293 to 473) K. The total uncertainties in viscosity, pressure, temperature, and composition measurements were estimated to be less than 1.6 %, 0.05 %, 15 mK, and 0.02 %, respectively. The effects of temperature, pressure, and concentration on the viscosity of SrCl2(aq) solutions were studied. The temperature and pressure coefficients of the viscosity of SrCl2(aq) were studied as a function of concentration and temperature. The measured values of viscosity were compared with data, predictions, and correlations reported in the literature. The viscosity data were used to accurately calculate the physical meaning parameters (viscosity A and B coefficients) in the extended Jones-Dole equation for the relative viscosity (eta/eta(0)). Various theoretical models [absolute rate theory, TTG (Tammann-Tait-Gibson) model, extended Einstein model] were used to accurately represent the measured values of viscosity. The values of hydrodynamic molar volume, V-k (effective rigid molar volume of salt), were calculated using the present experimental viscosity data. The high-pressure viscosity measurements were used to test the predictive capability of the TTG model.