1966 United States Senate election in Delaware
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 County Results Boggs: 50-60% 60-70% | |||||||||||||||||
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| Elections in Delaware |
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The 1966 United States Senate election in Delaware took place on November 8, 1966. Incumbent Republican U.S. Senator J. Caleb Boggs was re-elected to a second term in office. As of 2024, this is the last time the Republicans won the Class II Senate seat in Delaware.
General election
Candidates
- J. Caleb Boggs, incumbent U.S. Senator (Republican)
- James M. Tunnell Jr., former Justice of the Delaware Supreme Court and son of former Senator James M. Tunnell (Democratic)
Results
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Republican | J. Caleb Boggs | 97,268 | 59.12% |  8.41
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| Democratic | James M. Tunnell Jr. | 67,263 | 40.88% |  8.41
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| Total votes | 164,531 | 100.00% | |||
| Republican hold | |||||