Marshall County was created in 1836 from parts of Giles, Bedford, Lincoln, and Maury counties. Marshall County was originally going to be named Cannon County however, due to a clerical error at the time of formation in 1836, the names of Marshall and Cannon Counties, were accidentally swapped and never corrected. It was named after the American jurist, John Marshall who was Chief Justice of the U.S. Supreme Court. The county has a total area of 376 square miles with a population count of 33,683 residents.