The 2021 New Jersey State Senate election was held on November 2, 2021. New Jersey voters elected state senators in all of the state's legislative districts for a two-year term to the New Jersey Senate. Republicans flipped the 3rd and 8th districts, and Democrats flipped the 16th. This was the first election since 1991 where Republicans posted a net gain of state Senate seats. Democrats would later be restored to 25 seats following the party switch of Samuel D. Thompson in 2023.
Incumbents not running for re-election
Democratic
Republican
In addition, five members who were elected in the last election in 2017 have since left office: Robert M. Gordon (D-38th, resigned), Jeff Van Drew (D-1st, resigned), Anthony R. Bucco (R-25th, died in office), Gerald Cardinale (R-39th, died in office), and Chris A. Brown, (R-2nd, resigned after previously announcing retirement).
Predictions
Results
Overview
By State Senate District
Close races
Seats where the margin of victory was under 10%:
- gain
- gain
- gain
District 1
Republican primary
Democratic primary
General election
Polling<br />
Predictions<br />
Results<br />
District 2
Republican primary
Polling<br />
Democratic primary
General election
Polling<br />
Predictions<br />
Debate
Results<br />
District 3
Democratic primary
Republican primary
General election
Predictions<br />
Results<br />
District 4
Democratic primary
Republican primary
General election
Predictions<br />
Results<br />
District 5
Democratic primary
Republican primary
No Republicans filed. However, Clyde Cook received enough write-in votes to qualify for the general election.
General election
Predictions<br />
Results<br />
District 6
Democratic primary
Republican primary
General election
Predictions<br />
Results<br />
District 7
Democratic primary
Republican primary
General election
Predictions<br />
Results<br />
District 8
Democratic primary
Republican primary
General election
Predictions<br />
Debate
Results<br />
District 9
Republican primary
Democratic primary
General election
Predictions<br />
Results<br />
District 10
Republican primary
Democratic primary
General election
Predictions<br />
Results<br />
District 11
Democratic primary
Endorsements
Republican primary
General election
Predictions<br />
Results<br />
District 12
Republican primary
Democratic primary
General election
Predictions<br />
Results<br />
District 13
Republican primary
Democratic primary
General election
Predictions<br />
Results<br />
District 14
Democratic primary
Endorsements
Republican primary
General election
Predictions<br />
Results<br />
District 15
Democratic primary
Endorsements
Republican primary
General election
Predictions<br />
Results<br />
District 16
Republican primary
Democratic primary
Endorsements
General election
Polling<br />
Predictions<br />
Debate
Results<br />
District 17
Democratic primary
Endorsements
Republican primary
General election
Predictions<br />
Results<br />
District 18
Democratic primary
Endorsements
Republican primary
General election
Predictions<br />
Results<br />
District 19
Democratic primary
Republican primary
Following the primary, Onuoha was replaced on the ballot for the general election by Pedro "Peter" Pisar on August 23.
General election
Predictions<br />
Results<br />
District 20
Democratic primary
Candidates
Withdrew
- Jason Krychiw, suspended campaign on April 23, 2021
Results
Endorsements
Republican primary
No Republicans filed.
General election
Predictions<br />
Results<br />
District 21
Republican primary
Democratic primary
General election
Predictions<br />
Results<br />
District 22
Democratic primary
Republican primary
General election
Predictions<br />
Results<br />
District 23
Republican primary
Democratic primary
General election
Predictions<br />
Results<br />
District 24
Republican primary
Candidates
Results
Democratic primary
No Democrats filed. However, Frederick P. Cook received enough write-in votes to qualify for the general election.
General election
Predictions<br />
Results<br />
District 25
Republican primary
Democratic primary
General election
Predictions<br />
Results<br />
District 26
Republican primary
Democratic primary
General election
Predictions<br />
Results<br />
District 27
Democratic primary
Endorsements
Republican primary
General election
Predictions<br />
Results<br />
District 28
Democratic primary
Republican primary
General election
Predictions<br />
Results<br />
District 29
Democratic primary
Republican primary
No Republicans filed.
General election
Predictions<br />
Results<br />
District 30
Republican primary
Democratic primary
General election
Predictions<br />
Results<br />
District 31
Democratic primary
Republican primary
General election
Predictions<br />
Results<br />
District 32
Democratic primary
Candidates
Results
Republican primary
General election
Predictions<br />
Results<br />
District 33
Democratic primary
Republican primary
General election
Predictions<br />
Results<br />
District 34
Democratic primary
Republican primary
General election
Predictions<br />
Results<br />
District 35
Democratic primary
Republican primary
General election
Predictions<br />
Results<br />
District 36
Democratic primary
Republican primary
Republicans Chris Auriemma filed to run, withdrew, and then received enough write-in votes to qualify for the general election.
General election
Predictions<br />
Results<br />
District 37
Democratic primary
Debate
Endorsements
Republican primary
General election
Predictions<br />
Results<br />
District 38
Democratic primary
Candidates
Results
Republican primary
General election
Predictions<br />
Results<br />
District 39
Republican primary
Candidates
Results
Democratic primary
General election
Predictions<br />
Results<br />
District 40
Republican primary
Democratic primary
General election
Predictions<br />
Results<br />
See also
References