There are 16 US Post Offices in Montgomery County serving a total of 150,015 residents equating to 9,376 residents per post office. It's estimated that approximately 239,441 packages are handled across the 16 county post offices annually. Montgomery County is a county in the State of Alabama. As of the 2010 census, its population was 229,363. Its county seat is Montgomery. Montgomery County is included in the Montgomery, AL Metropolitan Statistical Area.