There are 15 US Post Offices in Bolivar County serving a total of 33,159 residents equating to 2,211 residents per post office. It's estimated that approximately 52,925 packages are handled across the 15 county post offices annually. Bolivar County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 34,145. Its county seats are Rosedale and Cleveland. The county is named in honor of Sim\u00f3n Bol\u00edvar, leader of the liberation of several South American countries from Spain in the early 19th century. The Cleveland, MS Micropolitan Statistical Area includes all of Bolivar County. It is located in the Mississippi Delta, or Yazoo Basin, of Mississippi."