Delmar is a town in Wicomico County, Maryland, United States. The population was 3,003 at the 2010 census. It is included in the Salisbury, Maryland-Delaware Metropolitan Statistical Area. When the population is added to "twin city" Delmar, Delaware the town's total population is 4,600. By comparison this is more than Pocomoke City, Maryland 4,184, Denton, Maryland 4,418, and Berlin, Maryland 4,485, but less than Fruitland, Maryland, 4,866.