State courts are judicial systems established by individual states in the United States to handle legal disputes and interpret state laws. They have the authority to hear a wide range of cases, including criminal, civil, family, and traffic matters. Each state has its own court structure, which typically includes trial courts, appellate courts, and a state supreme court. These courts operate independently from the federal court system, which deals with federal laws and constitutional issues. State courts play a crucial role in the legal process, ensuring that justice is served at the local level and that state laws are upheld.