There are 5 US Post Offices in Suwannee County serving a total of 21,013 residents equating to 4,203 residents per post office. It's estimated that approximately 33,539 packages are handled across the 5 county post offices annually. Suwannee County is a county located in the state of Florida. As of the 2010 census, the population was 41,551. Its county seat is Live Oak. Suwannee County was a dry county until August 2011, when the sale of alcoholic beverages became legal in the county."