In Spain, a judicial district (Spanish: Partido judicial) 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.