Binary diffusion coefficients of anisole, 2,4-dimethylphenol, and nitrobenzene in supercritical carbon dioxide have been determined at 313, 323, and 333 K and at pressures between 15.0 and 35.0 MPa. Measurements have been obtained using the Taylor-Axis dispersion technique. The data have been correlated with temperature, pressure, density, and viscosity, and some general trends have been established. The applicability of several correlations to the experimental data was examined, and some correlations have shown that they are satisfactory for predicting diffusion coefficients.