There are 5 US Post Offices in Carroll County serving a total of 7,628 residents equating to 1,526 residents per post office. It's estimated that approximately 12,175 packages are handled across the 5 county post offices annually. Carroll County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 10,597. Its county seats are Carollton and Vaiden Mississippi. The county is named for Charles Carroll of Carrollton, the last surviving signatory of the U.S. Declaration of Independence. Carroll County is part of the Greenwood, MS Micropolitan Statistical Area. It is inside the Mississippi Delta, although most of its land is in the hill country. It is the setting for the Porter Wagoner song \"The Carroll County Accident\", and was also mentioned in the third verse of Bobbie Gentry's 1967 hit song, \"Ode to Billie Joe\"."