For the purpose of the federal judiciary, each state is organized into between one and four judicial districts, which may be further subdivided into divisions. Each state is also independently divided into judicial districts or their equivalents for the purpose of its state judiciary.
Circuit courts are court systems in several common law jurisdictions. The core concept of circuit courts requires judges to travel to different locales to ensure wide visibility and understanding of cases in a region. More generally, some modern circuit courts may also refer to a court that merely holds trials for cases of multiple locations in some rotation.
It was formerly called as the Court of First Instance since the Spanish era. It continued throughout its colonization under Spanish and Americans. After the independence from the United States, Republic Act No. 296 or Judiciary Act of 1948 was enacted to reinforce its jurisdictional powers of the Court of First Instance. Under its law, it has the power to try civil and criminal cases, as well as appeals from the decisions made by the municipality and city Justice of the Peace courts. However, there were numerous cases both civil and criminal yet to be resolved or being delayed for years due to their nature. In addition, there were special courts made to try specialized cases like criminal, agricultural, and family to decongest cases, which unfortunately ended up complicating the judiciary system. Therefore, the Interim Batasang Pambansa has passed Batas Pambansa Blg. 129, or The Judiciary Reorganization Act of 1980, which reorganized the lower and intermediate courts in the country, which include the change of Court of First Instance to Regional Trial Court.
In Spain, a judicial district is a territorial unit for the administration of justice, composed of one or more municipalities bordering and within the same province. Among the municipalities that make up the judicial parties, one of them, usually the largest or highest number of contentious matters occur, it is called head of judicial party. In this head is the seat of one or more courts of first instance and instruction. Leading the rest of municipalities of the administrative area are the magistrates courts.