The 1993 New Jersey Senate election was held on November 4.
The election took place alongside Christine Todd Whitman's re-election as Governor over Senator Jim McGreevey. Republicans defended the large majority they gained in the 1991 landslide elections.
Four seats changed hands with no impact on the overall balance of power. Republicans Anthony R. Bucco and Diane Allen unseated incumbent Gordon MacInnes in the 25th district and gained the seat of retiring Senator Jack Casey in the 7th, respectively. Democrats Shirley Turner and Garry Furnari unseated incumbent Republicans Dick LaRossa in the 15th and John P. Scott in the 36th, respectively. One Senator, Republican Joseph Bubba, lost a primary. His challenger, Norman M. Robertson, held the 34th district for the Republicans. This remains the last time that Republicans won a Senate majority.
Seats where the margin of victory was under 10%: