Pat Benatar was born Patricia Mae Andrzejewski on January 10, 1953, in Greenpoint, Brooklyn, New York City. Her mother, Mildred (née Knapp) (1928–2016), was a beautician, and her father, Andrew Andrzejewski (in the Polish language: Andrzej Andrzejewski) (1926–2009), was a sheet-metal worker. Her father was of Polish descent and her mother was of German, English, and Irish ancestry. Her family moved to North Hamilton Avenue in Lindenhurst, New York, a village in the Long Island town of Babylon.
Benatar became interested in theater and began voice lessons, singing her first solo at the age of eight, at Daniel Street Elementary School, a song called “It Must Be Spring”. At Lindenhurst Senior High School (1967–1971), she participated in musical theater, playing Queen Guinevere in the school production of Camelot, marching in the homecoming parade, singing at the annual Christmas Tree Lighting ceremony, and performing a solo of “The Christmas Song” on a holiday recording of the Lindenhurst High School Choir in her senior year.