There are 8 US Post Offices in Sunflower County serving a total of 24,464 residents equating to 3,058 residents per post office. It's estimated that approximately 39,047 packages are handled across the 8 county post offices annually. Sunflower County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 29,450. Its largest city and county seat is Indianola. Sunflower County comprises the Indianola, MS Micropolitan Statistical Area, which is included in the Cleveland-Indianola, MS Combined Statistical Area. It is located in the Mississippi Delta region."