Both elections take place Nov. 4 and both primaries will be held June 3.
A special election took place in New Jersey last year following the death of Frank Lautenberg. That election took place a month prior to the general election, which included a gubernatorial race.
Andrews, a Democrat, resigned in February amid an ethics investigation that centers around his use of $30,000 in campaign funds to finance a family trip, among other accusations.
The Democratic Primary for the First Congressional District seat includes State Sen. Donald Norcross, of Camden, brother of Democratic powerbroker George Norcross; Logan Mayor Frank Minor; and Sicklerville resident Frank Broomell Jr.
Former Philadelphia Eagle Gary Cobb, of Cherry Hill, will pursue the Republican nomination, as will former Collingswood school board member Claire Gustaphson, Greenwich resident Lee Lucas and Winslow resident Gerard McManus.The First Congressional District covers parts of Camden County, including Collingswood, as well as parts of Gloucester and Burlington counties.