Who is the current Chief Justice of the United States?

The current Chief Justice of the United States is John Roberts. Appointed by President George W. Bush, he took office on September 29, 2005. As Chief Justice, he leads the Supreme Court, presides over oral arguments, and has significant influence in shaping the Court's agenda and opinions. His role includes not only making decisions on cases but also managing the Court's administration. The Chief Justice is also responsible for swearing in the President of the United States and serves as a member of various judicial and governmental committees.

The other individuals listed have significant roles within the Supreme Court but do not hold the position of Chief Justice. Ruth Bader Ginsburg, for instance, served as an Associate Justice until her passing in 2020, and Clarence Thomas and Samuel Alito are also Associate Justices on the Court. Each of these justices contributes to the judicial process, but the leadership role and responsibilities associated with being Chief Justice are unique to John Roberts.