Evaluation has been made of the density, enthalpy, entropy, viscosity, and thermal conductivity of helium in the range of pressures from atmospheric to 6000 psia and at temperatures from −440 F to 600 F. These data are composed of observed values published prior to 1945, and of extrapolations based upon the Beattie-Bridgeman equation of state and kinetic theory. The results evaluated to four significant figures are tabulated for particular values of pressure and temperature. Graphic plots of the same information are also presented, with an accuracy sufficient for investigations of flow and heat-transfer processes involving high-pressure helium.