Deal Island is located in Maryland. Deal Island, Maryland 21821has a population of 455. Deal Island 21821 is less family-centric than the surrounding county with 13% households with children. The county percentage for households with children is 25%.
The median household income in Deal Island, Maryland 21821 is $40,658. The median household income for the surrounding county is $43,058 compared to the national median of $66,222. The median age of people living in Deal Island 21821 is 57.5 years.
The average high temperature in July is 86.5 degrees, with an average low temperature in January of 30.2 degrees. The annual precipitation is 38.44.