21105 Maryland Line, MD is a small town located in Baltimore County. With a population of 25 people and a population density of 214 people per square mile, this rural area offers an escape from the hustle and bustle of larger towns and cities. The local businesses in 21105 include a convenience store, gas station, pizzeria, post office, library, and several banks. For those looking for outdoor activities, there are plenty of hiking trails nearby as well as golf courses and other recreational activities available year-round. Other organizations in the area include churches, volunteer fire departments, and community centers. Finally, the local sporting events include softball games at nearby parks as well as youth basketball leagues during the winter months.