New Castle County
There are 26 US Post Offices in New Castle County serving a total of 581,471 residents equating to 22,364 residents per post office. It's estimated that approximately 928,093 packages are handled across the 26 county post offices annually. New Castle County is the northernmost of the three counties of the U.S. state of Delaware. As of the 2010 census, the population was 538,479, making it the most populous county in Delaware. The county seat is Wilmington. New Castle County is included in the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD Metropolitan Statistical Area. The county is named after the English city of Newcastle. New Castle County has the highest population and population density of any Delaware county, even though it is the smallest. It is also the most economically developed of the three. New Castle County Executive Tom Gordon took office on November 13, 2012. New Castle County is home to two minor league sports teams: the Wilmington Blue Rocks (baseball) and the Delaware 87ers (basketball) which play in Newark. It also has a professional auto racing track in New Castle known as Airport Speedway, which races on Saturday nights throughout the summer.