There are 4 US Post Offices in Lafayette County serving a total of 44,014 residents equating to 11,004 residents per post office. It's estimated that approximately 70,251 packages are handled across the 4 county post offices annually. Lafayette County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 47,351. Its county seat is Oxford. The local pronunciation of the name is \"la-FAY-et\". The county is named to honor Marquis de Lafayette, a French military hero and American general who fought during the American Revolutionary War. The Oxford, MS Micropolitan Statistical Area includes all of Lafayette County. Lafayette County is often regarded as the inspiration for Yoknapatawpha County, the fictional setting of many of William Faulkner's stories."