Mary Pat Christie (née Foster; born September 15, 1963) is an American investment banker who was the First Lady of New Jersey between 2010 and 2018.

Christie was born to an Irish Catholic family in the Philadelphia suburb of Paoli, Pennsylvania, the ninth of 10 children.

[8][9] Governor Christie has cited his wife's success as a bond trader as enabling him to have a relatively low-paid political career.

[12] On the day of the September 11 attacks, she lost cell phone reception and was unable to contact her family.

[3] When he had to return to New Jersey in January 2016 as the blizzard of 2016 bore down on his state, Mary Pat stayed in New Hampshire and substituted for the Governor at scheduled campaign stops.