Liquid helium was shock-compressed in Hugoniot equation-of-state measurements at pressures of 1.2 and 16 GPa (12 and 160 kbar) using a two-stage light-gas gun . Specimens were initially at a temperature of 4.3 K and a molar volume of 32 cm3/mole. Specimen holders were a refinement of the cryogenic targets used for liquid H2 and D2 experiments . The data are in good agreement with the published theoretical prediction of Young, et al. The high shock temperatures test the repulsive pair potential to an interatomic spacing approaching 1 Å, which is comparable to a solid volume at a temperature of 0 K of about 0.5 cm3/mole.