|This article's factual accuracy is disputed. (July 2013)|
McClintock was born in Presque Isle, Maine on June 19, 1930. She attended Boston University in 1950, and received her Bachelor of Arts degree from San Jose State University in 1963. She was awarded a Doctorate in the Academy of Art University in San Francisco.
Although she earlier had wanted to teach for a profession, she purchased half of the Gunne Sax Clothing Company in 1970 for 5,000 dollars. In 1972 the co-owner who had founded the company decided to sell the remainder of the company to Jessica for a further 5000 dollars. This company would become Jessica McClintock Inc, which now sells a wide range of consumer items, including clothing, clothing accessories, eyeglasses, bridal wear, and home decor items.