Structural, magnetic and electrical transport properties were studied in the solid solution Y_xSr_1-xMnO₃ for the range of 0.4 ≤ x ≤ 0.9. These compounds were obtained in the perovskite phase (ABO₃) and scan a wide range of mean ionic radii for the A site and the corresponding tolerance factor. The samples were synthesized using a liquid mix method, at 900 °C in O₂ atmosphere, and characterized by X-ray powder diffraction (XRD), magnetic susceptibility and electric transport measurements. XRD data for all samples were refined by the Rietveld method in the space group Pnma. Magnetic measurements indicate a paramagnetic behavior in the range between 100 and 300 K. The dependence of structural parameters, like octahedron distortion and A site coordination number as a function of Y content was obtained showing a clear correlation with the magnetic behavior.