Final answer:
John Roberts is the current Chief Justice of the United States.
Step-by-step explanation:
The current Chief Justice of the United States is John Roberts. He has held this position since September 29, 2005. As the Chief Justice, he is the head of the judicial branch of the U.S. government and leads the Supreme Court. The Chief Justice is responsible for presiding over the Court's public sessions and conferences.
Learn more about Current Chief Justice of the United States