| Election Name: | 1968 United States Senate election in California |
| Country: | California |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1962 United States Senate election in California |
| Previous Year: | 1962 |
| Next Election: | 1974 United States Senate election in California |
| Next Year: | 1974 |
| Election Date: | November 5, 1968 |
| Image1: | Alan Cranston, 1963.jpg |
| Nominee1: | Alan Cranston |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 3,680,352 |
| Percentage1: | 51.82% |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 3,329,148 |
| Percentage2: | 46.87% |
| Map Size: | 300px |
| U.S. senator | |
| Before Party: | Republican Party (US) |
| After Party: | Democratic Party (US) |
The 1968 United States Senate election in California was held on November 5, 1968.
Incumbent Republican Thomas Kuchel was narrowly defeated in the June 4 primary by Superintendent of Public Instruction Max Rafferty. Rafferty would in turn go on to lose to Democratic former State Controller Alan Cranston by a close margin.