The United States Senate election of 1964 in Connecticut was held on November 3, 1964. Democratic Thomas J. Dodd was re-elected and served a second term. John Davis Lodge, grandson of Henry Cabot Lodge was defeated by almost 30%.
Dodd: 50–60% 60–70% 70–80%
|Democratic||Thomas J. Dodd (incumbent)||781,008||64.66%|
|Republican||John Davis Lodge||426,939||35.34%|