There are 10 US Post Offices in Somerset County serving a total of 24,020 residents equating to 2,402 residents per post office. It's estimated that approximately 38,339 packages are handled across the 10 county post offices annually. Somerset County is the southernmost county in the American State of Maryland. As of the 2010 census, the population was 26,470. making it the second-least populous county in Maryland. The county seat is Princess Anne. The county was named for Mary, Lady Somerset, the wife of Sir John Somerset and daughter of Thomas Arundell, 1st Baron Arundell of Wardour (ca 1560-1639). She was also the sister of Anne Calvert, Baroness Baltimore (1615-1649), who later lent her name to Anne Arundel County, which was erected in 1650 as the Province of Maryland's third county. Somerset County is included in the Salisbury, MD-DE Metropolitan Statistical Area. It is located on the state's Eastern Shore The University of Maryland Eastern Shore is located in Princess Anne."