1938 United States Senate election in Oklahoma

The 1938 United States Senate election in Oklahoma took place on November 8, 1938. Incumbent Democratic Senator Elmer Thomas ran for re-election to a third term. He faced a spirited challenge in the Democratic primary from Congressman Gomer Smith and Governor E. W. Marland, but won the nomination with a slim plurality. In the general election, Thomas faced former State Senator Harry O. Glasser, the Republican nominee. Despite the nationwide trend favoring Republicans, Thomas overwhelmingly won re-election.

Candidates

 * Elmer Thomas, incumbent U.S. Senator
 * Gomer Smith, U.S. Congressman from Oklahoma's 5th congressional district, 1932 Democratic candidate for the U.S. Senate
 * E. W. Marland, Governor of Oklahoma
 * Charles Francis Smith

Candidates

 * Harry O. Glasser, former State Senator
 * James D. Davidson, real estate salesman
 * William Oliver Cromwell, former Oklahoma Attorney General, 1914 Progressive nominee for the U.S. Senate
 * Wilfred Marion Leise

Candidates

 * P. C. Nelson
 * A. B. Lamb