There are 5 US Post Offices in Yalobusha County serving a total of 16,475 residents equating to 3,295 residents per post office. It's estimated that approximately 26,296 packages are handled across the 5 county post offices annually. Yalobusha County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 12,678. Its county seats are Water Valley and Coffeeville."