| Election Name: | 1984 United States Senate election in New Jersey |
| Country: | New Jersey |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1978 United States Senate election in New Jersey |
| Previous Year: | 1978 |
| Next Election: | 1990 United States Senate election in New Jersey |
| Next Year: | 1990 |
| Election Date: | November 6, 1984 |
| Image1: | File:Sen. Bill Bradley (NJ) (cropped).jpg |
| Nominee1: | Bill Bradley |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 1,986,644 |
| Percentage1: | 64.16% |
| Nominee2: | Mary V. Mochary |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 1,080,100 |
| Percentage2: | 34.88% |
| Map Size: | 280px |
| U.S. Senator | |
| Before Election: | Bill Bradley |
| Before Party: | Democratic Party (United States) |
| After Election: | Bill Bradley |
| After Party: | Democratic Party (United States) |
The 1984 United States Senate election in New Jersey was held on November 6, 1984. Incumbent Democrat Bill Bradley defeated Republican nominee Mary V. Mochary with 64.16% of the vote, winning every county in the state. To date, this is the most recent time Hunterdon, Sussex, and Warren counties were won by a Democrat in a statewide election. This was also the last time Morris County voted Democratic in a statewide election until 2020, where Senator Cory Booker won the county in his reelection and Joe Biden won the county in the 2020 presidential race.
Primary elections were held on June 5, 1984.[1]
Mochary was forced to suspend her campaign in October due to her husband's life-threatening illness. She traveled with her husband to Stanford, California for an experimental heart transplant.[2]