| Tom Holbrook | |
| Office: | St. Clair County Clerk |
| Term Start: | July 1, 2013 |
| Preceded: | Bob Delaney |
| Office2: | Chairman of the Illinois Pollution Control Board |
| Term Start2: | October 23, 2011 |
| Term End2: | June 30, 2013 |
| Preceded2: | Tanner Girard |
| Succeeded2: | Deanna Glosser |
| State House3: | Illinois |
| State3: | Illinois |
| District3: | 113th |
| Term Start3: | January 11, 1995 |
| Term End3: | October 22, 2011 |
| Preceded3: | Monroe L. Flinn |
| Succeeded3: | Scott E. Penny |
| Birth Date: | 23 May 1949 |
| Birth Place: | St. Louis, Missouri |
| Party: | Democratic |
| Spouse: | Molly |
| Children: | One Daughter |
| Residence: | Belleville, Illinois |
| Profession: | Politician |
Thomas Holbrook (born May 23, 1949) is an Illinois politician who serves as the St. Clair County Clerk. He was appointed to replace Bob Delaney.[1] [2] Prior to this he served as Chairman of the Illinois Pollution Control Board from 2011 to 2013[3] and a Democratic member of the Illinois House of Representatives representing the 113th District for eight terms from 1995 until 2011.