| DATE | EVENT |
| 24 Jan 1854 | Trempealeau Co. created |
| 23 Jul 1856 | Courthouse in Galesville was ready for occupancy |
| 1858 | State legislature was petitioned for removal of County Seat |
| 1868 | State legislature authorized a vote for removal of County Seat |
| 07 Nov 1876 | Citizens voted to move County Seat to Arcadia |
| 1877 | Citizens voted to move County
Seat to Whitehall. County supervisors held their first meeting at Whitehall |
| 1878 | Proposition to remove the County Seat to Blair rejected by the voters |
| 1882 | Proposition to return the County Seat to Arcadia was rejected |
| 1883 | Petition to move the County Seat to Independence did not get enough support |
| 1883 | Courthouse was started in Whitehall, completed in 1884 |
| 1886 | The County Jail was built |