The SEIU (Service Employees International Union) Illinois State Council is the state-level governing body for Illinois-based SEIU locals. SEIU Illinois State Council consists of 11 local unions, the largest being SEIU Healthcare Illinois-Indiana-Missouri-Kansas, a local spanning Illinois, Indiana, Missouri, and Kansas, claiming 92,000 members. 
The SEIU Illinois State Council makes political endorsements on behalf of the state’s locals and it has historically supported solely Democratic and left-progressive candidates. In 2018, the State Council supported Democratic gubernatorial candidate J.B. Pritzker and Democratic congressional candidate Jesus “Chuy” Garcia. 
The State Council’s activities appear to have declined: Its website does not have an active list of locals and leadership, nor does it have any press releases past March 23, 2018. 
The SEIU Illinois State Council is headed by the leadership of the Chicago-are SEIU Local 1. SEIU Local 1 president Tom Balanoff heads the State Council; SEIU Local 1 officer Laura Garza is the state council’s recording secretary.  SEIU Healthcare Illinois-Indiana-Missouri-Kansas president Gregory Kelley is the Council’s vice president. 
The SEIU Illinois State Council’s 2017 tax returns reported total revenues of $2,872,134 and total expenses of $1,417,876. 
In 2017, it reported directing $350,000 in elective “checkoff” contributions to its political action committee, the SEIU Illinois Council PAC Fund.  It also gave $31,600 to left-of-center Illinois-based lobbying groups, like Citizen Action/Illinois and the Illinois Alliance for Retired Americans.