There are 7 US Post Offices in Murray County serving a total of 8,064 residents equating to 1,152 residents per post office. It's estimated that approximately 12,871 packages are handled across the 7 county post offices annually. Murray County is a county located in the U.S. state of Minnesota. The population was 8,725 at the 2010 census. Its county seat is Slayton. The county was formed in 1857 and organized in 1872."