When the township organization law was adopted, Rock Island, which then included all of the township of South Rock Island, was entitled to two representatives upon the County Board of Supervisors. In 1875 the number was increased to three and in 1881 to five. The following named have served upon the Board
| 1857 | R.M. Marshal, Z. Cook |
| 1858 | A.S. Wait, Frazer Wilson |
| 1859 | Harrison Boggess, C.M. Knox |
| 1860 | T.J. Robinson, M.A. Swiler |
| 1861 | T.J. Robinson, M.A. Swiler |
| 1862 | B.K. Kimball, Jacob Frysinger |
| 1863 | B.K. Kimbal, L.D. Dimick |
| 1864 | S.B. Stoddard, B.H. Kimball |
| 1865 | B.H. Kimball, S.B. Stoddard |
| 1866 | B.H. Kimball, S.B. Stoddard |
| 1867 | B.H. Kimball, S.B. Stoddard |
| 1868 | S.B. Stoddard, Jabov Ohlweiler |
| 1869 | Chas. B. Knox, T.D. Barnes |
| 1870 | Chas. B. Knox, Wm. A. Johnston |
| 1871 | H.H. Mayo, Wm. A. Johnston |
| 1872 | H.H. Mayo,Ernst Krell |
| 1873 | W.N. Jarvis, Ernst Krell |
| 1874 | Henry Dart, Ernst Krell |
| 1875 | Henry Dart, Ernst Krell , Henry S. Case |
| 1876 | Henry Case, John Aster, W.L. Sweeney |
| 1877 | Henry Case, John Aster, W.L. Sweeney |
| 1878 | John Aster, Julius Strohle, Adam Mancker |
| 1879 | M. Koch, Wm. Atkinson, H.C. Cleveland |
| 1880 | Wm. Atkinson, C.H. Ritter, F.M. Sinnet, Julius Masenfelder |
| 1881 | Wm. Atkinson, C.H. Ritter,Geo. Schneider, Arthur Burrall, Chas. J. Blomberg |
| 1882 | C.H. Ritter, F.M. Sinnet, C.H. Stoddard, Geo. Schneider,Chas. J. Blomberg |
| 1883 | John Aster, Chas. J. Blomberg, James D. Warnock, William E. Brooks,Geo. Schneider Sr. |
| 1884 | John Aster, Geo. Schneider, Arthur Burrall, C.P. Swanson, David Fitzgerald |
| 1885 | John Aster, Geo. Schneider, Arthur Burrall, C.P. Swanson, David Fitzgerald and Thomas Smart |
Historic Rock Island
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Illinois Ancestors
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