| Election Name: | 1966 Texas gubernatorial election |
| Election Date: | November 8, 1966 |
| Country: | Texas |
| Type: | presidential |
| Previous Election: | 1964 Texas gubernatorial election |
| Previous Year: | 1964 |
| Next Election: | 1968 Texas gubernatorial election |
| Next Year: | 1968 |
| Ongoing: | no |
| Image1: | File:John Connally (cropped).jpg |
| Nominee1: | John Connally |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 1,037,517 |
| Percentage1: | 72.8% |
| Nominee2: | T. E. Kennerly |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 368,025 |
| Percentage2: | 25.8% |
| Map Size: | 310px |
| Governor | |
| Before Election: | John Connally |
| Before Party: | Democratic Party (United States) |
| After Election: | John Connally |
| After Party: | Democratic Party (United States) |
The 1966 Texas gubernatorial election was held on November 8, 1966, to elect the governor of Texas. Incumbent Democratic Governor John Connally was easily reelected to a third term, winning 73% of the vote to Republican T. E. Kennerly's 26%. Connally swept all 254 counties in this election and was inaugurated for his third term on January 17, 1967.
The election is, to date, the last time that a candidate for Governor of Texas won more than 70% of the vote, as well as the last in which a candidate won every county. As of, Randall, Ochiltree, and Smith counties have not voted for the Democratic candidate since this election.