The CDF and D0 collaborations at Fermilab's Tevatron p anti-p
collider have in place an extensive program to measure fundamental
properties of the top quark. Recent results from Run I (s**(1/2) = 1.8 TeV)
and Run II (s**(1/2) = 1.96 TeV) on the top quark's production, mass, and
decays are presented here. All results are consistent within their
uncertainties with the Standard Model expectations for the top quark.