Densities and excess molar volumes of dimethyl carbonate + six methyl n-alkyl ketones, namely, 2-propanone, 2-butanone, 2-pentanone, 2-hexanone, 2-octanone, and 2-undecanone, have been determined at 298.15 K and atmospheric pressure using an Anton Paar density meter. The results have been correlated by means of the Redlich-Kister equation, and the adjustable parameters have been determined by the least-squares method. All excess volumes are positive with the exception of dimethyl carbonate + 2-propanone. V-m(E)(x(1)=0.5) increases as the chain length of the ketones increases.