The majority of cases in the US are heard by the various state courts.
State courts, by far, hear more cases per year than all of the Federal Circuits combined.
There have been millions of court cases brought in federal district courts.
The Supreme Court of the United States was created in 1789. Most of the cases the court hears come from lower courts. Each year, the Supreme Court receives 7,000 or more requests to hear cases from lower courts.
All federal courts hear cases on appeal or original jurisdiction cases.
US District Courts have original (trial) jurisdiction over the majority of cases heard in the federal court system.US Special Courts, such as US Tax Court, US Bankruptcy Court, and the US Court of Federal Claims, also hear a large number of cases.
Federal courts do a lot of things. They hear cases just like state courts, but operate in a different system. They are allowed to hear different kinds of cases than state courts (like if the issue is about the constitution). Also, if the parties in a case are citizens of different states (this is called "diversity") the case is started in a federal court system.
Both federal and state courts have jurisdiction over criminal cases.
Most federal cases begin in the district courts.
Federal district court.
Courts of original jurisdiction (trial courts). In the federal court system, cases of general jurisdiction are heard in US District Courts.
Courts of Appeals is the intermediate-level federal court the courts of appeals is considered the workhorse of the court system.
US district courts have trial jurisdiction (aka original jurisdiction) over federal court cases.