Patricia Era Bath was born on November 4, 1942, in Harlem, New York, to Rupert Bath, the first black motorman for the New York City subway system, and Gladys Bath, a housewife and domestic worker who used her salary to save money for her children's education. Bath was encouraged by her family to pursue academic interests. Her father, a former Merchant Marine and an occasional newspaper columnist, taught Bath about the wonders of travel and the value of exploring new cultures. Her mother piqued the young girl's interest in science by buying her a chemistry set.