  The EXO-200 Collaboration is searching for neutrinoless double beta decay
using a liquid xenon (LXe) time projection chamber. This measurement relies on
modeling the transport of charge deposits produced by interactions in the LXe
to allow discrimination between signal and background events. Here we present
measurements of the transverse diffusion constant and drift velocity of
electrons at drift fields between 20~V/cm and 615~V/cm using EXO-200 data. At
the operating field of 380~V/cm EXO-200 measures a drift velocity of
1.705$_{-0.010}^{+0.014}$~mm/$\mu$s and a transverse diffusion coefficient of
55$\pm$4~cm$^2$/s.
