Presented are measurements of the W boson mass from the Dempty set and CDF collaborations at the Tevatron from the 1994-1996 run. The W events are produced in <p(p)over bar> collisions at root s = 1.8 TeV. The W mass extracted from W --> e nu decays at Dempty set is determined to be 80.45+/-0.12 GeV; and from W --> mu nu decays at CDF is 80.43+/-0.16 GeV. The world average W mass from the hadron collider measurements is 80.41+/-0.09 GeV.