In the present work, densities (rho) of glycine, L-alanine, aminobutyric acid, L-valine, and L-leucine in an aqueous solution of calcium acetate (0.2005; 0.5998; 0.9000; 1.1978; and 1.5991) mol kg(-1) have been measured at T = 293.15-308.15 K and pressure P = 0.1 MPa. The infinite dilution apparent molar volumes (V-phi(0)) and standard volumes of transfer (Delta V-tr(phi)0) vary linearly with those of carbon atoms in the alkyl chain of the amino acids. The contributions of the nonpolar groups to the value of V-phi(0) increase with the size of the alkyl chain of amino acids and decrease with the concentration increase of calcium acetate. The groupcontribution of charged end groups (NH3+, COO-) is larger than that corresponding to alkyl chains. The standard transfer volumes (Delta V-tr(phi)0 phi) for all amino acids are positive and increase with the calcium acetate concentrations and decrease with temperature, except for L-valine and L-leucine. Volumetric interaction coefficients of amino acids have been determined using the McMillan-Mayer equation. Calcium acetate shows a strong dehydration effect on amino acids over the entire concentration range. All results show a preferential solvation phenomenon in the mixture due to electrostatic interactions at the first layer solvation between the charged groups of amino acids and the inorganic salt.