There are 114 Mailing Services in New Castle County, Delaware, serving a population of 555,036 people in an area of 427 square miles. There is 1 Mailing Service per 4,868 people, and 1 Mailing Service per 3 square miles.
In Delaware, New Castle County is ranked 1st of 3 counties in Mailing Services per capita, and 1st of 3 counties in Mailing Services per square mile.