Who is the current Chief Justice of the United States?

The current Chief Justice of the United States is John Roberts. He has held this position since September 2005 after being nominated by President George W. Bush. As Chief Justice, Roberts presides over the Supreme Court's proceedings and has significant influence over its agenda, including which cases are heard and the manner in which arguments are conducted. His role requires him not only to lead the court during oral arguments but also to guide discussions and help maintain decorum among the justices.

The other individuals listed, such as Clarence Thomas, Ruth Bader Ginsburg, and Elena Kagan, have all served as associate justices on the Supreme Court, but none have held the title of Chief Justice. Ruth Bader Ginsburg, in particular, passed away in September 2020, making her an incorrect choice for this question regarding the current Chief Justice.