2021 New Jersey elections

A general election was held in the U.S. state of New Jersey on November 2, 2021. Primary elections were held on June 8. All elected offices at the state level are on the ballot in this election cycle, including Governor and Lieutenant Governor for four-year terms, all 80 seats in the New Jersey General Assembly for two-year terms, and all 40 seats in the State Senate for four-year terms. In addition to the gubernatorial and State Legislative elections, numerous county offices and County Commissioners in addition to municipal offices were up for election. There were also two statewide ballot questions as well.

State senate
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. This was the first election since 1991 where Republicans net gained state Senate seats. Democrats would later be restored to 25 seats following the party switch of Samuel D. Thompson in 2023.

General Assembly
The 2021 New Jersey General Assembly election was held on November 2, 2021. New Jersey voters elected two Assembly members in all of the state's legislative districts for a two-year term to the New Jersey General Assembly.

All 80 seats of the New Jersey General Assembly were up for election. Democrats held a 52-28 majority in the lower house prior to the election. The members of the New Jersey Legislature are chosen from 40 electoral districts. Each district elects one state senator and two State Assembly members. New Jersey uses coterminous legislative districts for both its State Senate and General Assembly.

Ultimately, Republicans gained six seats in the chamber, reducing Democrats' majority to 46-34. They flipped both seats in the 2nd, 3rd, and 11th districts.

Ballot measures
Two statewide questions were on the ballot, one of which was approved by voters:
 * Public Question Number 1, Allows wagering on postseason college sports competitions held in N.J. and competitions in which a N.J.-based college team participates. This amendment was defeated.
 * Public Question Number 2, Allows organizations to use raffle money to raise money for their own organization. This amendment passed.