The 1966 United States Senate election in Georgia was held on November 8, 1966. Incumbent Democrat Senator Richard Russell Jr. was elected to a sixth term in office.
On September 14, Russell won the Democratic primary with 90.59% of the vote against only nominal opposition from . At this time, Georgia was a one-party state and the Democratic nomination was tantamount to victory. No Republican had run for Senate since 1932. Russell won the November general election without an opponent.
Russell did not complete his term; he died in January 1971.