Delmar 21875 Real EstateDelmar is located in Maryland. Delmar, Maryland 21875has a population of 3,748. Delmar 21875 is less family-centric than the surrounding county with 18.94% of the households containing married families with children. The county average for households married with children is 25.13%. The median household income in Delmar, Maryland 21875 is $66,987. The median household income for the surrounding county is $63,610 compared to the national median of $69,021. The median age of people living in Delmar 21875 is 37.7 years. Delmar WeatherThe average high temperature in July is 87 degrees, with an average low temperature in January of 27.4 degrees. The average rainfall is approximately 46.1 inches per year, with 8.4 inches of snow per year. Delmar MapReal estate near DelmarNearby CitiesNearby Cities Homes for Sale |