Special districts in Illinois are forms of local government that are responsible for a narrow set of responsibilities, as opposed to counties, townships, and municipal governments which have a wide range of responsibilities. School districts and community college boards are not usually considered special-purpose governments despite their narrow focus on education.
Illinois has the most special districts of any U.S. state. The exact number depends on how one defines a "special district." The United States Census Bureau has determined that Illinois has 3,227 special-purpose governments as of June 30, 2012; the most of any U.S. state.[1] The Office of the Illinois Comptroller, which uses a broader definition that includes special districts without budget autonomy, determined the state has 4,755 as of December 2015.[2]
The various districts may enact ordinances, rules, and regulations to carry out their various duties. Most have police powers to enforce those rules. Special districts have other powers granted to them by relevant laws.[3]