Sandra Adelson is an American businesswoman and philanthropist, best known as the first wife of billionaire casino magnate Sheldon Adelson. Born in 1944, she married Sheldon in 1970, and the couple co-founded the Interface Group, a company that organized the pioneering COMDEX computer trade shows, which became a major success in the 1970s and 1980s. Together, they raised three children: Mitchell (born 1971), Gary (1973), and Shelley (1976). Sandra played an active role in the early business ventures that helped establish Sheldon's fortune, contributing to the foundational aspects of what would later become his vast gaming and hospitality empire. The marriage ended in divorce in 1981, reportedly due to Sheldon's infidelity, with Sandra receiving a substantial settlement that included equity in Interface Group and other assets. Following the divorce, Sandra maintained a relatively private life, though she has been involved in philanthropic activities. Her contributions to business and family life with Sheldon remain a notable part of his early biography, highlighting her influence in the nascent stages of the computer and entertainment industries.