Conowingo, MD

ZIP code 21918 represents Edgewood, a suburban area in Harford County, Maryland. This ZIP code is home to the Edgewood Arsenal and the Edgewood Chemical Biological Center. Additionally, it is nearby the Aberdeen Proving Ground, a major U.S. Army facility. With a mix of residential neighborhoods and military installations, ZIP code 21918 offers a unique blend of community and national defense infrastructure.