There are 7 US Post Offices in Lowndes County serving a total of 60,594 residents equating to 8,656 residents per post office. It's estimated that approximately 96,715 packages are handled across the 7 county post offices annually. Lowndes County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 59,779. Its county seat is Columbus. The county is named for U.S. Congressman William Jones Lowndes. Lowndes County comprises the Columbus, MS Micropolitan Statistical Area. Since the late 20th century, it has been designated as one of three counties in the Golden Triangle region of the state."