Jackson County was the twenty-sixth county founded in the State of Missouri on December 15, 1826. Until Louisiana became a state, we were part of the Louisiana Territory.
In 1812, we became part of the Missouri Territory and Governor Clark divided the future state into 5 original counties; Cape Girardeau, New Madrid, St. Charles, St. Genevieve and St. Louis. Jackson County was taken from part of Lafayette, which was part of Cooper County.
Cooper was originally part of Howard County, which was part of Oregon County. Oregon County was carved from Ripley County which was taken from Wayne County. All of these counties were part of the original Cape Girardeau County.