Mary D is located in Pennsylvania. Mary D, Pennsylvania has a population of 240. Mary D is less family-centric than the surrounding county with 16% households with children. The county percentage for households with children is 24%.
The median household income in Mary D, Pennsylvania is $51,974. The median household income for the surrounding county is $53,710 compared to the national median of $66,222. The median age of people living in Mary D is 49.1 years.
The average high temperature in July is 84.4 degrees, with an average low temperature in January of 18.3 degrees. The annual precipitation is 53.16.