| Election Name: | 1988 Delaware gubernatorial election |
| Country: | Delaware |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1984 Delaware gubernatorial election |
| Previous Year: | 1984 |
| Next Election: | 1992 Delaware gubernatorial election |
| Next Year: | 1992 |
| Election Date: | November 8, 1988 |
| Image1: | File:Mike Castle 1982.jpg |
| Nominee1: | Mike Castle |
| Party1: | Republican Party (United States) |
| Running Mate1: | Dale E. Wolf |
| Popular Vote1: | 169,733 |
| Percentage1: | 70.7% |
| Nominee2: | Jacob Kreshtool |
| Party2: | Democratic Party (United States) |
| Running Mate2: | Gary E. Hindes |
| Popular Vote2: | 70,236 |
| Percentage2: | 29.3% |
| Governor | |
| Before Election: | Mike Castle |
| Before Party: | Republican Party (United States) |
| After Election: | Mike Castle |
| After Party: | Republican Party (United States) |
The 1988 Delaware gubernatorial election took place on November 8, 1988. Incumbent Republican governor Mike Castle won re-election to a second term, defeating Democratic nominee labor lawyer Jacob Kreshtool in a landslide. Both were unopposed in their respective primaries., this was the last time a Republican was elected Governor of Delaware.