- Source of Wealth: Inheritance
- Age: 75
- Marital Status: Married (William)
- Full Name: Katharine Ann Rayner
- Nationality: American
- Date of Birth: January 12, 1945
- Occupation: Heiress
Katherine Rayner is an American billionaire heiress who has an estimated net worth of $5.86 billion.
Katharine Rayner inherited her fortune through her mother, Anne Cox Chambers. She is a member of the board for Morgan Library, the New York Public Library, and Animal Rescue Fund. She received her share from Cox Enterprises in 2015.
Katharine Ann Rayner was born on January 12, 1945. She is married to retired Conde Nast executive and painter William Rayner.