dis·trict n: a territorial division (as of a nation, state, county, or city) for administrative, judicial, electoral, or other purposes: as
a: an administrative unit esp. of a town or city established for the performance of a special governmental function
the water district
park district
c: one of the divisions of the United States or of the individual states served by a particular federal or state court see also the judicial system in the back matter
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.