Calvin Richard Klein (born November 19, 1942) is an American fashion designer. In 1968, he launched the company that would later become Calvin Klein Inc.

In addition to clothing, Calvin Klein also gave his name to a range of perfumes, including CK One and CK Be (fragrances for both genders), now owned by Coty Inc. Swatch Group manufactures watches and jewelry under the Calvin Klein and Calvin Klein Jeans brands.

Born Richard Klein in The Bronx to Jewish-Hungarian immigrants, he attended the High School of Industrial Art and matriculated, but never graduated, from New York's Fashion Institute of Technology, receiving an honorary Doctorate at the graduation ceremony in 2003. He did his apprenticeship in 1962 at an oldline cloak-and-suit manufacturer, and spent five years designing at other New York shops. He later launched his first company with a childhood friend.