Delmar is a town located in Sussex County, in the state of Delaware (DE), United States. Nestled in the South Atlantic division of the South region, it covers an area of 0.9 square miles (2.0 km²) and sits at an elevation of 55 ft. With a population of approximately 1,407 residents, Delmar offers a peaceful, rural atmosphere.
The town's population is composed of about 44.07% males and 55.93% females, and it has a population density of 496.81 people per square mile (577.92/km²). Delmar lies at a latitude of 38.46 and a longitude of -75.57, operating in the UTC-5.
Locals reflect a blend of American ancestry, with roots primarily in United States (12.9%), followed by English (13.9%), German (10.4%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 19940.