Who is the current Chief Justice of the United States (as of October 2021)?

The current Chief Justice of the United States as of October 2021 is John Roberts. He has served as Chief Justice since September 29, 2005, after being nominated by President George W. Bush. As Chief Justice, Roberts presides over court proceedings, leads the business of the Supreme Court, and plays a crucial role in shaping the legal direction of the country through his influence on court decisions and opinions.

Ruth Bader Ginsburg was a prominent figure on the Supreme Court until her passing in September 2020, and her legacy remains influential, but she was not Chief Justice. Anthony Kennedy served as an Associate Justice until his retirement in 2018, and while he was important in many key decisions, he did not hold the position of Chief Justice. Clarence Thomas, another Associate Justice, has been on the bench since 1991 but is not the Chief Justice. John Roberts continues to lead the court, making him the correct answer for this question.