There are 21 US Post Offices in Middlesex County serving a total of 158,331 residents equating to 7,540 residents per post office. It's estimated that approximately 252,714 packages are handled across the 21 county post offices annually. Middlesex County is a county in the south central part of the U.S. state of Connecticut. As of the 2010 census, the population was 165,676. The county was created in May 1785 from portions of Hartford County and New London County. Middlesex County is included in the Hartford-West Hartford-East Hartford metropolitan statistical area known as Greater Hartford. As with all eight of Connecticut's counties, there is now no county government and no county seat. In Connecticut, towns are responsible for all local government activities, including local police, fire and rescue, snow removal, and schools. In a few cases, neighboring towns will share certain resources, e.g. water, gas, etc. Middlesex County is merely a group of towns on a map, and no longer has any particular authority."