| 1818 | Missouri became a territory. |
| 1819 | Henry R. Schoolcraft explored the area now known as Christian County |
| 1821 | Missouri became a state. |
| ca. 1822 | First settlers came to the area now known as Christian County. |
| 1843 | Village of Ozark was incorporated. |
| 8 March 1859 | Christian County was organized in an act passed by the state legislature. |
| 2 August 1861 | Civil War skirmish at Dug Springs, Christian County. |
| 1865 | Courthouse burned. |
| 1882 | Chadwick branch of the Springfield Southern Railroad was completed. |
| 10 May 1889 | Baldknobber hanging |
| April 1922 | Tornado in Ozark |
| 1945 | New Christian County Fairgrounds was built. |
| 1975 | Christian County Museum was started. |
Sources for this time line:
The Christian County Historian (a quarterly published by the Christian Co. Historical Society)
Christian County --Its First Hundred Years, published by Christian County Centennial, Inc, 1959
Bygone Days, by John Eustler Williams, 1988