Delmar [dɛlmɑːr] is a town in Wicomico County, Maryland, United States.

The name of Delmar was derived for this railroad center from the states whose line it straddles – DELaware and MARyland.

The Town of Delmar grew slowly until 1884 when the New York, Philadelphia and Norfolk Railroad Co. completed a railroad from Pocomoke City, Maryland to Cape Charles, Virginia and also established a ferry service across the Chesapeake Bay between Cape Charles and Norfolk, Virginia.

These new developments immediately made the Delmarva Peninsula an important link between the north and south.

As a result of these developments, a tremendous influx of experienced railroad men into the community and considerable extra employment was furnished for local townspeople.

New dwelling units sprang up all over town and new businesses were established to meet the demands of its growing population.

An examination of this charter and the laws of Maryland fails to reveal any mention of the twin town of Delmar, Delaware.

The construction of the sewerage system in 1927 was considered the first joint project between the two towns in that the law provided that both towns would maintain the outfall sewer with Maryland paying the expenses and billing the Delaware side one-half of all costs.

The biggest push towards abolishing the jurisdictional, legal effects of the State line came when the Lions Club voted to sponsor a project for the consolidation of the two school systems in the town.

Four years later the fourth, fifth and sixth grades were also consolidated with classes in the Maryland school.