Millennium Bank was founded on a personalized, community-oriented approach to banking that we are proud to deliver to residents of Tennessee and Florida. Millennium Bank opened its doors for business on June 21, 1999, in Chattanooga, Tennessee, to serve the financial needs of the growing areas in eastern Hamilton County. More than two decades later, Millennium Bank is still locally owned and operated, serving Hamilton County residents at five locations with the same dedication and expertise. On June 1, 2020, Millennium Bank acquired Columbia Bank, one of the oldest and strongest financial institutions in Florida, with roots firmly planted in Columbia County for over 100 years. We are proud to share our Bank Locally. Live Easily. experience with residents in the greater Chattanooga, Lake City, Gainesville and Ocala areas.