The low-field mobility of electrons in supercritical Xe has been measured isothermally as a function of density above the critical temperature (289.7 K). At 293 K the mobility varies from a high of 890 cm(2)/V s at 9.2x10(21) atoms/cm(3) to a minimum value of 4.6 cm(2)/V s at a density of 3.5x10(21) atoms/cm(3), which is just below the critical density. The density dependence of the mobility is reasonably well predicted by the deformation potential model if the adiabatic compressibility is used to characterize the electron-medium interactions. Approximate agreement indicates that electrons are quasifree in supercritical xenon. (C) 2003 American Institute of Physics.