Sylvia Mercer is the wife of Robert Mercer, a prominent American hedge fund manager, computer scientist, and major donor to conservative political causes. She is also the mother of Rebekah Mercer, who is a significant figure in conservative political activism and philanthropy. She is a member of the Mercer family, known for its ties to conservative philanthropy. While her husband and daughter have maintained high public profiles, Sylvia Mercer has largely remained out of the public eye, maintaining a very private personal life. Her direct involvement in the family's conservative political funding and philanthropic activities is not widely reported, though she is implicitly part of the broader Mercer family network.