105 ILCS 5/34-2

City to constitute district-Corporate status of board.

Each city having a population exceeding 500,000 shall constitute one school district which shall maintain a system of free schools under the charge of a board of education. The district shall be a body politic and corporate by the name of "Board of Education of the City of ...." and by that name may sue and be sued in all courts and places where judicial proceedings are had.