The 1938 United States Senate election in Arkansas took place on November 8, 1938. Incumbent Senator
Hattie Caraway ran for a second term in office. After narrowly defeating U.S. Representative
John Little McClellan in the Democratic primary, she easily won the general election over Republican C.D. Atkinson.
Caraway, already the first woman elected to the U.S. Senate, became the first woman elected to a second term in office.