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 is the first election since 1888 that a Democrat was re-elected to this seat, and the first time ever that they were popularly re-elected to this seat.
Primary elections were held on June 5, 1984.
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.
Counties that flipped from Republican to Democratic