The radiation induced electrical conductances of liquids methane, ethane, and propane have been measured. At a field strength of 5 kV/cm the number of ion pairs collected at the electrodes per 100 eV absorbed by the liquid was 1.5 in methane (−160°), 0.20 in ethane (−90°), and 0.14 in propane (−90°). The short-lived conductance transient (k/u overshoot) observed at low field strengths in methane was 40% as large as that in argon. No transient was observable in ethane or propane. The freeness of motion of electrons in liquid methane is nearly as great as that in liquid argon and much greater than that in ethane or propane.