How many justices sit on the US Supreme Court?

The correct answer is that there are nine justices who sit on the US Supreme Court. This number has been established since 1869, reflecting the intent of the Judiciary Act of 1869. The structure of the Supreme Court has remained fairly consistent, with the nine justices serving as the highest court in the federal judiciary. Their role is crucial in interpreting the Constitution, federal laws, and resolving disputes involving states.

Other options propose numbers that do not reflect the current structure of the Court. Seven justices and eleven justices do not align with the historical composition, while thirteen is even further from the tradition and current practice based on legislative enactments. Thus, nine is firmly established as the correct count of justices on the Supreme Court and is vital for understanding the judicial system in the United States.