There are 109 Plumbing Services in Howard County, Maryland, serving a population of 312,495 people in an area of 251 square miles. There is 1 Plumbing Service per 2,866 people, and 1 Plumbing Service per 2 square miles.
In Maryland, Howard County is ranked 18th of 24 counties in Plumbing Services per capita, and 6th of 24 counties in Plumbing Services per square mile.