In 1860, Dade County seceded from not only the state of Georgia, but also from the United States, however the secession was never recognized to have any legal effect. In 1945, the county symbolically rejoined Georgia and the United States.
The first settlers of Dade County won the land in Georgia's land lottery and came to work in coke and coal mines.
Georgia did not have a road connecting to Dade County until the purchase of Cloudland Canyon in 1939. The county could only be accessed through Alabama and Tennessee until then.
Covenant College, founded in 1955 in California, needed to expand into new facilities after just one year. Several professors helped Covenant move to St. Louis, Missouri where it grew for eight years and in 1964 the institution outgrew its facilities and moved to Lookout Mountain.
Dade County had a short-lived state secessionist movement during the civil war. Dade Countians wanted to secede from the Union but the State of Georgia was cautious. Legend has it that in 1860, the people of Dade County were so impatient on their state to secede from the Union, they simply seceded by themselves. On July 4, 1945, a telegram from President Harry S. Truman was read at a celebration marking the county's rejoining the Union. Historians believe, however, that Dade County seceded with the State of Georgia and reentered the Union with it.