The 1938 Wyoming gubernatorial election took place on November 8, 1938. Incumbent Democratic Governor Leslie A. Miller ran for re-election to his third term, and his second full term. Nels H. Smith, a former State Representative and former state highway commissioner, won a crowded Republican primary and advanced to the general election against Miller. Though Miller won his re-election campaign four years earlier in a landslide, Smith was able to take advantage of the nationwide Republican wave to defeat him in a landslide, winning 60% of the vote to Governor Miller's 40%.