Who is the current Chief Justice of the United States as of 2023?

The current Chief Justice of the United States as of 2023 is John Roberts. He has held this position since his appointment by President George W. Bush in 2005. As Chief Justice, Roberts presides over the Supreme Court and is responsible for ensuring the efficient and orderly conduct of Court proceedings. He also plays a significant role in the Court's deliberations and decision-making processes.

The other individuals mentioned have had notable roles in the judiciary but do not hold the position of Chief Justice. Ruth Bader Ginsburg served on the Supreme Court until her passing in 2020. Clarence Thomas and Samuel Alito are both Associate Justices on the Supreme Court but do not serve as Chief Justice.