The latest results on W and Z cross sections from p anti-p
collisions recorded by the CDF and D0 experiments at the Fermilab Tevatron
collider, operating at a centre of mass energy of 1.96 TeV, are presented.
These results have been used to validate (N)NLO QCD calculations, measure
quark couplings, test lepton universality and constrain parton distribution
functions.  The width of the W boson has been obtained both directly from W
events having a large transverse mass and indirectly from the ratio of W and
Z cross sections.  The possibility of using W events to determine the
luminosity at the Tevatron and the future prospects for these measurements
is also discussed.