| Year | Age | State | Party | Office | District | Stage | Pos | Votes | % |
|---|---|---|---|---|---|---|---|---|---|
| 1996 | IL | R | State Senate | District 024 | Primary | 1 | 7,611 | 50.3% | |
| 1996 | IL | R | State Senate | District 024 | General | 1 | 36,680 | 50.1% | |
| 2000 | IL | R | State Senate | District 024 | General | 1 | 38,104 | 51.7% | |
| 2002 | IL | R | State Senate | District 041 | Primary | 1 | 14,480 | 52.3% | |
| 2002 | IL | R | State Senate | District 041 | General | 1 | 53,151 | 72.3% | |
| 2004 | IL | R | State Senate | District 041 | Primary | 1 | 19,796 | 100.0% | |
| 2004 | IL | R | State Senate | District 041 | General | 1 | 92,604 | 100.0% | |
| 2006 | IL | R | Treasurer | Primary | 1 | 576,174 | 100.0% | ||
| 2006 | IL | R | Treasurer | General | 2 | 1,404,756 | 41.2% | ||
| 2008 | IL | R | State Senate | District 041 | Primary | 1 | 18,930 | 69.5% | |
| 2008 | IL | R | State Senate | District 041 | General | 1 | 74,777 | 63.6% | |
| 2012 | IL | R | State Senate | District 041 | Primary | 1 | 24,040 | 99.7% | |
| 2012 | IL | R | State Senate | District 041 | General | 1 | 79,517 | 100.0% | |
| 2016 | IL | R | State Senate | District 041 | General | 1 | 87,665 | 100.0% | |
|
Age: Age as of July 1 of the year pertaining to this election. |