There are 5 US Post Offices in Mcintosh County serving a total of 14,172 residents equating to 2,834 residents per post office. It's estimated that approximately 22,620 packages are handled across the 5 county post offices annually. McIntosh County is a county located in the U.S. state of Georgia. As of the 2010 census, the population was 14,333. The county seat is Darien. McIntosh County is included in the Brunswick, GA Metropolitan Statistical Area."