| Election Name: | 1820 New Jersey gubernatorial election |
| Country: | New Jersey |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1819 New Jersey gubernatorial election |
| Previous Year: | 1819 |
| Next Election: | 1821 New Jersey gubernatorial election |
| Next Year: | 1821 |
| Election Date: | 26 October 1820 |
| Nominee1: | Isaac Halstead Williamson |
| Party1: | Democratic-Republican Party |
| Popular Vote1: | 52 |
| Percentage1: | 100.00% |
| Governor | |
| Before Election: | Isaac Halstead Williamson |
| Before Party: | Democratic-Republican Party |
| After Election: | Isaac Halstead Williamson |
| After Party: | Democratic-Republican Party |
The 1820 New Jersey gubernatorial election was held on 26 October 1820 in order to elect the governor of New Jersey. Incumbent Democratic-Republican governor Isaac Halstead Williamson was re-elected by the New Jersey General Assembly as he ran unopposed.[1]
On election day, 26 October 1820, incumbent Democratic-Republican governor Isaac Halstead Williamson was re-elected by the New Jersey General Assembly as he ran unopposed, thereby retaining Democratic-Republican control over the office of governor. Williamson was sworn in for his fourth term that same day.[2]