There are 325 Mailing Services in San Diego County, California, serving a population of 3,283,665 people in an area of 4,206 square miles. There is 1 Mailing Service per 10,103 people, and 1 Mailing Service per 12 square miles.
In California, San Diego County is ranked 43rd of 58 counties in Mailing Services per capita, and 10th of 58 counties in Mailing Services per square mile.