One special election was held in the 1st Legislative District to complete the unexpired term of Jeff Van Drew.

[1][2] Andrzejczak was later defeated in the special election in November by Republican Mike Testa.

[3] An additional vacancy in the State Senate was created by the September 2019 death of Anthony Bucco.

The deadline for a 2019 special election having passed,[4] a special election will be held in 2020 pending which his son Tony Bucco was appointed by a party convention to hold the seat on an interim basis.

New Jersey uses coterminous legislative districts for both its State Senate and General Assembly.