  We have calculated the $O(\alpha_{ew} M_t^2/M_W^2)$ supersymmetric
electroweak corrections to single top quark production via $q\bar q' \to t\bar
b$ at the Fermilab Tevatron in the minimal supersymmetric model. The
supersymmetric electroweak corrections to the cross section are a few percent
for $tan \beta> 1$, and can exceed 10% for $tan\beta<1$. The combined effects
of SUSY electroweak corrections and the Yukawa corrections can exceed 10% for
favorable parameter values, which might be observable at a high-luminosity
Tevatron.
