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County results Mondale: 40–50% 50–60% 60–70% 70–80% Forsythe: 40–50% 50–60% 60–70% | |||||||||||||||||
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The1966 United States Senate election in Minnesota took place on November 8, 1966. Incumbent DemocraticU.S. SenatorWalter Mondale, who had originally been appointed in 1964 to replaceHubert Humphrey after Humphrey was electedVice President of the United States, defeated Republican challenger Robert A. Forsythe, to win a full term.
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic (DFL) | Walter Mondale (Incumbent) | 410,841 | 90.97% | |
| Democratic (DFL) | Ralph E. Franklin | 40,785 | 9.03% | |
| Total votes | 451,626 | 100.00% | ||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Republican | Robert A. Forsythe | 211,282 | 81.19% | |
| Republican | Henry A. Johnsen | 48,941 | 18.81% | |
| Total votes | 260,223 | 100.00% | ||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic (DFL) | Walter Mondale (Incumbent) | 685,840 | 53.94% | |
| Republican | Robert A. Forsythe | 574,868 | 45.21% | |
| Socialist Workers | Joseph Johnson | 5,487 | 0.43% | |
| Industrial Government | William Braatz | 5,231 | 0.41% | |
| Total votes | 1,271,426 | 100.00% | ||
| Majority | 110,972 | 8.73% | ||
| Democratic (DFL)hold | ||||