Marbury is an unincorporated community in Charles County, Maryland. It has been designated the zip code of 20658. It is 6.3 miles from Indian Head on Maryland Route 224.Marbury was the point at which the 2002 tornado touched down, before traveling east to demolish much of La Plata, Maryland. Marbury is located at 38°34′31″N 77°09′21″W / 38.57528°N 77.15583°W / 38.57528; -77.