Lowell Ganz was born on August 31, 1948 in New York City, New York, United States. Son of Irving and Jean (Farber) Ganz. Both of his parents were first-generation Americans born in New York. His mother's family is of Polish Jewish origin from the Białystok area; his father's family is of Hungarian Jewish origin from Maramaros County, in what is today northern Romania. Ganz grew up in Queens, New York.