From Longman Dictionary of Contemporary Englishschool districtˈschool ˌdistrict noun [countable] SESan area in one state of the US that includes a number of schools which are governed together
Examples from the Corpus
school district• However, tenured teachers do not have a right either to a particular position in a school district or to indefinite employment.• A teacher can also lose tenure status by accepting a teaching position in another school district.• Discussions between the school district and Austin Community College about sharing education and training facilities also got under way.• The lawsuit demands Arnold turn over the fees he earned in the transactions to the school district. 