In this study, infinite dilution diffusion coefficients of aromatic compounds in ternary mixtures were measured at 298.15 K using the Taylor dispersion technique. The experimental data of benzene in mixtures of hexane + heptane + cyclohexane, hexane + decane + cyclohexane, and methanol + ethanol + acetone and benzaldehyde in methanol + ethanol + water systems are reported. Modeling of experimental data was performed with literature models commonly considered for binary systems. Special attention was paid to their extension to ternaries using mixture viscosity correlations.