Polizzi, 24, is known for her hard-partying ways. She is engaged to Jionni LaValle, her boyfriend of more than a year, and confirmed last week she is pregnant with their first child.
"While things will definitely be a little different this time when they hit the boardwalk, their trademark hilarity and family dysfunction will remain the same," MTV said in a statement announcing the show's renewal.
Other members of the show's ensemble who will return include Jennifer "JWoww" Farley, Michael "The Situation" Sorrentino, Paul "Pauly D" DelVecchio, Ronnie Ortiz-Magro and Samantha "Sweetheart" Giancola.
Celebrity Families of 2014 [PHOTOS]