Densities of nine binary solutions made of one of three 1-butyl-3-methylimidazolium ([bmim]) halides with water, methanol, or ethanol were measured at atmospheric pressure. The compositions of an ionic liquid ([bmim]Cl, [bmim]Br, or [bmim]I) were increased up to 0.4 as a mole fraction at a given temperature within a range of 293.15 to 318.15 K. The measured values were correlated by a quadratic equation to obtain a temperature dependency of the respective systems. Furthermore, the equation was used to obtain the volume expansivity, which would be used for a pressure-volume-temperature behavior of a condensed phase. The apparent molar volumes were also calculated from the experimental data. The remarkable distinction of the volumetric property behavior between aqueous and nonaqueous solutions was found and attributed to strong ion.solvent interactions in the aqueous systems.