Densities, rho, have been measured for three binary mixtures and a ternary mixture formed by water (1), methanol (2), and ethanol (3) over the entire range of compositions at temperatures from (283.15 to 313.15) K in 5 K intervals and at ambient pressure (81.5 kPa). The excess molar volumes, V-m(E), partial excess molar volumes, V-i(E), and their values at infinite dilution, V-i(E,0), for binary and ternary liquid mixtures and thermal expansion coefficients, (x, of the pure component were calculated. The excess molar volumes were correlated with the Redlich-Kister equation (for binary data) and the Cibulka equation (for ternary data). The excess molar volumes, V-m(E), were compared with values from the literature in the region of overlap.