| Commissioner | Residence | Commissioner Term | Chairman Term | Appointed By |
| James E. Quan | Chicago | January 1914 to April 1915 | January 1914 to January 1914 | Edward F. Dunne |
| Walter A. Shaw | Chicago | January 1914 to February 1921 | | Edward F. Dunne |
| Owen P. Thompson | Jacksonville | January 1914 to July 1917 | | Edward F. Dunne |
| Richard Yates | Springfield | January 1914 to July 1917 | | Edward F. Dunne |
| Frank H. Funk | Bloomington | January 1914 to February 1917 | | Edward F. Dunne |
| William O'Connell | Chicago | April 1915 to May 1917 | May 1917 to May 1917 | Edward F. Dunne |
| Thomas E. Dempcy | E. St. Louis | May 1917 to July 1921 | May 1917 to May 1917 | Frank O. Lowden |
| Patrick Lucey | Chicago | July 1917 to January 1921 | | Frank O. Lowden |
| Fred E. Sterling | Rockford | July 1917 to January 1919 | | Frank O. Lowden |
| James H. Wilkerson | Glencoe | March 1919 to January 1921 | November 1919 to January 1921 | Frank O. Lowden |
| Cicero J. Lindly | Greenville | February 1921 to September 1926 | February 1921 to February 1921 | Len Small |
| Hal W. Trovillion | Herrin | February 1921 to August 1929 | | Len Small |
| P. H. Moynihan | Chicago | February 1921 to August 1929 | May 1928 to August 1929 | Len Small |
| James F. Sullivan | Chicago | February 1921 to September 1923 | | Len Small |
| Frank L. Smith | | April 1921 to September 1926 | April 1921 to April 1921 | Len Small |
| Alex J. Johnson | Chicago | October 1921 to November 1923 | | Len Small |
| William J. Smith | Waukegan | August 1922 to August 1929 | | Len Small |
| William Burkhardt | Chicago | September 1923 to January 1927 | | Len Small |
| Edward H. Wright | Chicago | November 1923 to September 1928 | | Len Small |
| David H. Jackson | Chicago | January 1927 to May 1928 | January 1928 to May 1928 | Len Small |
| Alex J. Johnson | Chicago | January 1927 to September 1929 | | Len Small |
| Paul J. Kuhn | Batavia | January 1928 to February 1933 | | Len Small |
| James R. Clark | Bloomington | July 1928 to August 1929 | | Len Small |
| Daniel Jackson | Chicago | September 1928 to May 1929 | | Len Small |
| Charles W. Hadley | Wheaton | August 1929 to January 1932 | August 1929 to January 1932 | Louis L. Emmerson |
| G. Gale Gilbert | Mt. Vernon | August 1929 to July 1933 | January 1932 to February 1933 | Louis L. Emmerson |
| William Brinkman | Chicago | August 1929 to February 1933 | | Louis L. Emmerson |
| Phil W. Collins | Chicago | August 1929 to July 1933 | | Louis L. Emmerson |
| Walter H. Wilson | Chicago | August 1929 to February 1933 | | Louis L. Emmerson |
| Paul Samuell | Jacksonville | January 1932 to July 1933 | | Louis L. Emmerson |
| Rice Miller | Hillsboro | August 1932 to February 1933 | | Louis L. Emmerson |
| B. F. Lindheimer | Chicago | February 1933 to May 1936 | February 1933 to May 1936 | Henry Horner |
| Charles Byrne | E River Forest | February 1933 to July 1941 | | Henry Horner |
| Andrew Olson | Moline | February 1933 to March 1940 | | Henry Horner |
| Ernest J. Kruetgen | Chicago | May 1933 to September 1933 | | Henry Horner |
| James D. Marnane | Chicago | November 1933 to July 1941 | | Henry Horner |
| Harry A. Barr | Champaign | February 1934 to December 1937 | | Henry Horner |
| James M. Slattery | Chicago | May 1936 to April 1939 | May 1936 to April 1939 | Henry Horner |
| William W. Hart | Benton | June 1939 to July 1941 | September 1939 to November 1940 | Henry Horner |
| Paul J. Raver | Oak Park | July 1939 to September 1939 | July 1939 to September 1939 | Henry Horner |
| Robert M. Harper | East Moline | May 1940 to July 1941 | | Henry Horner |
| Roy D. Keehn | Lake Bluff | November 1940 to April 1941 | November 1940 to April 1941 | John Stelle |
| John D. Biggs | Greenville | April 1941 to February 1951 | April 1941 to February 1949 | Dwight H. Green |
| William Parrillo | Chicago | July 1941 to February 1949 | | Dwight H. Green |
| Frank Peska | Chicago | July 1941 to February 1949 | | Dwight H. Green |
| Edwin Rosenstone | Cambridge | July 1941 to February 1950 | | Dwight H. Green |
| Val J. Washington | Chicago | July 1941 to February 1949 | | Dwight H. Green |
| Walter T. Fisher | Winnetka | March 1949 to January 1953 | March 1949 to January 1953 | Adlai E. Stevenson |
| Kenneth Campbell | Chicago | March 1949 to April 1951 | | Adlai E. Stevenson |
| James J. Danaher | Chicago | March 1949 to January 1953 | | Adlai E. Stevenson |
| Dale E. Sutton | Pekin | March 1950 to January 1953 | | Adlai E. Stevenson |
| J. G. Van Keuren | DuQuoin | March 1951 to February 1961 | | Adlai E. Stevenson |
| Cyrus J. Colter | Chicago | June 1951 to September 1973 | | Adlai E. Stevenson |
| George R. Perrine | Alton | January 1953 to September 1961 | January 1953 to July 1961 | William G. Stratton |
| Jesse L. Simpson | Edwardsville | January 1953 to August 1963 | | William G. Stratton |
| William Vicars | Pontiac | January 1953 to February 1959 | | William G. Stratton |
| Alfred H. Reichman | Champaign | March 1959 to May 1980 | | William G. Stratton |
| James W. Karber | Ridgway | February 1961 to March 1969 | July 1961 to March 1969 | Otto Kerner |
| Edward Price | Chicago | June 1962 to May 1963 | | Otto Kerner |
| Robert Perbohner | Chicago | May 1963 to August 1969 | | Otto Kerner |
| Robert E. Dolph | Aurora | September 1963 to June 1968 | | Otto Kerner |
| David H. Armstrong | Aurora | November 1968 to April 1969 | April 1969 to January 1973 | Samuel H. Shapiro |
| C. Burton Nelson | Rockford | September 1969 to January 1980 | October 1977 to November 1977 | Richard B. Ogilvie |
| Haynes E. Reese | Carbondale | September 1969 to May 1973 | | Richard B. Ogilvie |
| Marvin Lieberman | Decatur | January 1973 to September 1977 | | Daniel Walker |
| Helen D. Schmid | Glen Ellyn | May 1973 to June 1983 | | Daniel Walker |
| Charles E. Freeman | Chicago | September 1973 to December 1976 | | Daniel Walker |
| Charles G. Stalon | Carbondale | September 1977 to November 1984 | | James R. Thompson |
| Charles P. Kocoras | Oak Lawn | November 1977 to January 1979 | | James R. Thompson |
| C. Burton Nelson | Rockford | January 1979 to March 1979 | January 1979 to March 1979 | James R. Thompson |
| Michael V. Hasten | Chicago | March 1979 to January 1983 | | James R. Thompson |
| Andrew C. Barrett | Chicago | May 1980 to September 1989 | | James R. Thompson |
| Daniel Rosenblum | Chicago | February 1981 to January 1985 | | James R. Thompson |
| Philip O'Connor | Chicago | January 1983 to December 1985 | | James R. Thompson |
| Ruth K. Kretschmer | Medinah | June 1983 to December 2002 | | James R. Thompson |
| Mary B. Bushnell | Stillman Valley | November 1983 to October 1989 | December 1985 to October 1989 | James R. Thompson |
| Susan C. Stone | Champaign | January 1984 to October 1989 | | James R. Thompson |
| Stanford Levin | Edwardsville | November 1984 to January 1986 | | James R. Thompson |
| Calvin K. Manshio | Chicago | January 1985 to March 1992 | | James R. Thompson |
| Raymond G. Romero | Chicago | December 1985 to February 1990 | | James R. Thompson |
| Paul G. Foran | Danville | December 1985 to June 1993 | | James R. Thompson |
| Lynn Shishido-Topel | Chicago | October 1989 to April 1995 | | James R. Thompson |
| Ellen C. Craig | Chicago | October 1989 to April 1994 | February 1992 to March 1994 | James R. Thompson |
| Jerry Blakemore | Chicago | February 1990 to March 1992 | | James R. Thompson |
| Terrence L. Barnich | Springfield | February 1992 to November 1993 | October 1989 to February 1992 | James R. Thompson |
| Karl A. McDermott | Homer | April 1992 to May 1998 | | James Edgar |
| David S. Williams | Chicago | April 1992 to May 1995 | | James Edgar |
| William M. Dickson | Chicago | June 1993 to May 1996 | | James Edgar |
| Dan Miller | Chicago | April 1994 to May 1998 | April 1994 to May 1998 | James Edgar |
| Richard E. Kolhauser | Springfield | April 1994 to January 2000 | | James Edgar |
| Brent S. Bohlen | Springfield | May 1996 to February 1999 | | James Edgar |
| Richard L. Mathias | Winnetka | May 1998 to September 2002 | May 1998 to September 2002 | James Edgar |
| Terry S. Harvill | Chicago | May 1998 to January 2003 | | James Edgar |
| Edward C. Hurley | Chicago | February 1999 to September 2005 | April 2003 to September 2005 | George H. Ryan |
| Mary Frances Squires | Springfield | March 2000 to June 2004 | | George H. Ryan |
| Kevin K. Wright | Springfield | September 2002 to February 2007 | September 2002 to April 2003 | George H. Ryan |
| Lula M. Ford | Chicago | January 2003 to Present | | Rod R. Blagojevich |
| Erin M. O'Connell-Diaz | Chicago | April 2003 to Present | | Rod R. Blagojevich |
| Robert F. Lieberman | Chicago | February 2005 to Present | | Rod R. Blagojevich |
| Martin R. Cohen | Chicago | September 2005 to November 2005 | September 2005 to November 2005 | Rod R. Blagojevich |
| Charles E. Box | Rockford | January 2006 to Present | January 2006 to Present | Rod R. Blagojevich |
| Sherman J. Elliott | | January 2008 to Present | | Blagojevich |