| Election Name: | 1840 New York gubernatorial election |
| Country: | New York |
| Flag Year: | 1778 |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1838 New York gubernatorial election |
| Previous Year: | 1838 |
| Next Election: | 1842 New York gubernatorial election |
| Next Year: | 1842 |
| Election Date: | November 2–4, 1840 |
| Nominee1: | William H. Seward |
| Party1: | Whig Party (United States) |
| Popular Vote1: | 222,011 |
| Percentage1: | 50.30% |
| Nominee2: | William C. Bouck |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 216,726 |
| Percentage2: | 49.10% |
| Map Size: | 350px |
| Governor | |
| Before Election: | William H. Seward |
| Before Party: | Whig Party (United States) |
| After Election: | William H. Seward |
| After Party: | Whig Party (United States) |
The 1840 New York gubernatorial election was held from November 2 to 4, 1840, to elect the Governor and Lieutenant Governor of New York.
The Whig Party nominated incumbent governor William H. Seward. They nominated incumbent Luther Bradish for Lieutenant Governor.
The Democratic Party nominated former Erie Canal Commissioner William C. Bouck. They nominated state senator Daniel S. Dickinson for Lieutenant Governor.
The Liberty party nominated Gerrit Smith. They nominated Charles O. Shepard for Lieutenant Governor.
The Whig ticket of Seward and Bradish was elected.