1966 United States Senate election in Louisiana
The 1966 United States Senate election in Louisiana was held on November 8, 1966. Incumbent Democratic Senator Allen Ellender was elected to a sixth term in office. On August 13, Ellender won the Democratic primary with 74.17% of the vote. At this time, Louisiana was a one-party state and the Democratic nomination was tantamount to victory. Ellender won the November general election without an opponent.