| Election Name: | 1966 United States Senate election in Kansas |
| Country: | Kansas |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1962 United States Senate special election in Kansas |
| Previous Year: | 1962 (special) |
| Next Election: | 1972 United States Senate election in Kansas |
| Next Year: | 1972 |
| Election Date: | November 8, 1966 |
| Image1: | James B. Pearson (R-KS).jpg |
| Nominee1: | James B. Pearson |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 350,077 |
| Percentage1: | 52.15% |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 303,223 |
| Percentage2: | 45.17% |
| Map Size: | 270px |
| U.S. senator | |
| Before Party: | Republican Party (US) |
| After Party: | Republican Party (US) |
The 1966 United States Senate election in Kansas took place on November 8, 1966, concurrently with elections to the United States Senate in other states as well as elections to the United States House of Representatives and various state and local elections.
Incumbent Republican U.S. Senator James B. Pearson defeated Democratic nominee James Floyd Breeding with 52.15% of the vote.
Primary elections were held on August 2, 1966.[1]