High quality piezoelectric single crystals Sr3TaGa 3Si2O14 were grown using the conventional Czochralski method along the Y-axis. The mass density was found to be 5.121 g cm-3 by the Archimedes method. The relative dielectric constants, piezoelectric strain coefficients and elastic compliance constants of Sr 3TaGa3Si2O14 single crystals were determined by an electric bridge and the resonant-antiresonant method at room temperature. The results were , , d11 = -4.90 pC N-1, d14 = 3.20 pC N-1; ; ; ; ; ; and , respectively. The temperature dependent behaviour of elastic compliance constants was also investigated, where zero temperature compensated cuts were not found in the range from -40 to 120 °C. © 2009 IOP Publishing Ltd.