Mary Jo Codey (née Rolli; born August 14, 1955) is an American healthcare activist and former First Lady of New Jersey.

Codey was born Mary Jo Rolli in Glen Ridge, New Jersey, she grew up in West Orange.

She then earned a Master of Arts degree in elementary education, with certification as a Learning Disabilities Teacher Consultant (LDTC), from Seton Hall University.

Codey and her family live in Roseland, New Jersey and she currently teaches at a private elementary school.

She has said that while she enjoyed the opportunity to be First Lady and to advocate for causes she believed in, she was looking forward to her husband leaving office in order to return to being a private citizen.