By use of a flow-type apparatus, vapor-phase compositions in supercritical carbon dioxide at 323.15 K have been measured for 1-nonanol, 1-undecanol, 1-tridecanol, and 1-pentadecanol over the pressure range from 80 to 250 bar. The measured mole fractions of solute in supercritical carbon dioxide are correlated with the reduced density and reduced pressure of the pure solvent.