Delmar is a town in
Sussex County,
Delaware,
United States, on the
Maryland border along the
Transpeninsular Line. Its motto is "The Little Town Too Big for One State." The population was 1,597 at the
2010 census, an increase of 13.5% over the previous decade. It is part of the
Salisbury, Maryland-Delaware Metropolitan Statistical Area and a suburb of
Salisbury, MD. When added with "twin city"
Delmar, Maryland, the total population of the town was 4,600 at the 2010 Census.