Current occupant and duties 
As of 2011[update], the Treasurer of Illinois is Dan Rutherford, a member of the Republican Party. Rutherford was elected to head the State Treasury in 2010 over Democratic Party candidate Robin Kelly.
The Treasurer is required by the State Constitution (Section 18 of Article V) to hold responsibility for the safekeeping and investment of the monies and securities deposited in the public funds of Illinois. The Treasurer is not the state's chief financial officer, a post reserved for a separate elected official, the Illinois Comptroller.
The Illinois Constitution provides that the treasurer must, at the time of his or her election, be a United States citizen, at least 25 years old, and a resident of the state for at least 3 years preceding the election.
List of office holders 
- John Riley Tanner (1887–1891)
- John C. Martin (1933–1935)
- Adlai Stevenson III (1967–1970)
- Alan J. Dixon (1971–1977)
- Jerome Cosentino (1979–1983)
- James Donnewald (1983–1987)
- Jerome Cosentino (1987–1991)
- Pat Quinn (1991–1995)
- Judy Baar Topinka (1995–2007)
- Alexi Giannoulias (2007–2011)
- Dan Rutherford (2011—)
Some observers have perceived an overlap between the offices of Treasurer of Illinois and Comptroller of Illinois, and have therefore proposed constitutional amendments to merge the two offices and earn administrative savings. For example, HJRCA 14, considered by the Illinois General Assembly in 2007-2008, would have merged the two offices into the office of a single State Fiscal Officer.
In 2011, the incumbent Treasurer along with the Comptroller (also former Treasurer) Judy Baar Topinka introduced legislation to allow voters to decide whether the offices should be merged. The legislation was opposed by Michael Madigan, Speaker of the Illinois House of Representatives.
- Section 18, Article V, "Constitution of Illinois", accessed April 12, 2008.
- "Dan Rutherford - Illinois State Treasurer", accessed January 25, 2011.Illinois State Treasurer web page
- "House Joint Resolution - Constitutional Amendment 14", accessed April 12, 2008.
- McQUEARY, KRISTEN (December 31, 2011). "Move to Allow Vote to Merge Treasurer and Comptroller Jobs Stalls in House". The New York Times. Retrieved 11 January 2012.
- WETTERICH, CHRIS (08 June 2011). "Madigan blocking merger of treasurer, comptroller's offices". THE STATE JOURNAL-REGISTER. Retrieved 11 January 2012.