| Election Name: | 1978 Connecticut gubernatorial election |
| Country: | Connecticut |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1974 Connecticut gubernatorial election |
| Previous Year: | 1974 |
| Next Election: | 1982 Connecticut gubernatorial election |
| Next Year: | 1982 |
| Election Date: | November 7, 1978 |
| Image1: | File:Ella Grasso.jpg |
| Nominee1: | Ella Grasso |
| Running Mate1: | Bill O'Neill |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 613,109 |
| Percentage1: | 59.15% |
| Nominee2: | Ronald Sarasin |
| Running Mate2: | Lewis Rome |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 422,316 |
| Percentage2: | 40.74% |
| Governor | |
| Before Election: | Ella Grasso |
| Before Party: | Democratic Party (United States) |
| After Election: | Ella Grasso |
| After Party: | Democratic Party (United States) |
The 1978 Connecticut gubernatorial election was held on Tuesday November 7, to elect Governor of Connecticut, Incumbent Governor Ella Grasso and running mate William A. O'Neill defeated Republican candidate Ronald A. Sarasin and running mate Lewis Rome with 59.15% of the vote.
Primary elections were held on September 12, 1978.[1]