Y-doped SrTiO 3 was synthesized via solid-state reaction. The effects of Y-doping on the sinterability and the electrical conductivity of Y x Sr 1−x TiO 3 were investigated. Y-doping can increase the sintering activity and the electrical conductivity of SrTiO 3 when yttrium amount is less than 0.09 in Y x Sr 1−x TiO 3 . Excessive yttrium will cause the generation of an insulating phase Y 2 Ti 2 O 7 , which impedes the densification process and decreases the electrical conductivity of Y x Sr 1−x TiO 3 material. With the increased temperature, the electrical conductivity of Y-doped SrTiO 3 increases first and then decreases gradually, showing a mixed conduction behavior of semi-conductors and metals. The optimized Y 0.09 Sr 0.91 TiO 3 possesses an electrical conductivity on the order of 32.5–195.8Scm −1 in the temperature range of 25–1000°C and being 73.7Scm −1 at 800°C in forming gas. The thermal cycling in air does not remarkably affect the electrical conductivity and the conduction behavior of Y 0.09 Sr 0.91 TiO 3 at high temperatures. Y 0.09 Sr 0.91 TiO 3 displays a relatively stable electrical conductivity at different oxygen partial pressures and excellent chemical compatibility with YSZ at temperatures lower than 1300°C.