The analysis of in situ plasma electron observations in the Io plasma torus by the plasma science experiment during the Voyager 1 encounter with Jupiter is presented in terms of two components: a thermal(c) Maxwellian component and suprathermal (H) non-Maxwellian component of the electron distribution function. Average electron temperatures are Te7.6) and then continues to rise to Te>100 eV at r>12 RJ. In the cold torus the density ratio of the suprathermal component nH to that of the cold component nc was 2.5 &mgr;V/m which exceeds the ambipolar electric field E∥<1 &mgr;V/m produced by the centrifugally confined ions. However, if unacceptable charge imbalances in the thermal plasma are not to occur from this larger E∥, then sufficient wave turbulence in the plasma must be present to adequately scatter the thermal electrons. We infer the presence of a neutral corona around Io from the observed decrease and symmetry with respect to Io of Tc. The energy input to the torus by charge exchange and ionization in this neutral corona followed by pickup is ~2¿1011 W, substantially less than the EUV luminosity. In the hot torus, suprathermal electrons contribute significantly to the ionization of the more highly ionized ions (O+,O2+,S2+, and S3+). ¿American Geophysical Union 1987