Christy Ruth Walton (born February 8, 1949)is the widow of John T. Walton, one of the sons of Sam Walton, the founder of Wal-Mart. After John's death in June 2005, she inherited his fortune of US$18.2 billion.

According to Forbes, she is the 6th richest person in the United States, and the 10th richest person in the world, as of November 2013. Forbes reported that she was the richest woman in the world for seven years running, and still held the title in March 2014. As of March 2014, she and her family (not including her two brothers-in-law and a sister-in-law) had an estimated net worth of $36.7 billion, the bulk of which comes from her shares in Wal-Mart, but also from First Solar, in which her husband invested. She resides in Jackson, Wyoming and has one son, Lukas. As of November 2013, Christy Walton was listed as the 9th richest person in the world.