Delmar is a town in Sussex County, Delaware, United States, on the Maryland affix along the Transpeninsular Line. Its wise saying is “The Little Town Too immense for One State.” The population was 1,597 at the 2010 census, an deposit 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 supplementary with Delmar, Maryland, the total population of the town was 4,600 at the 2010 Census.

The Town of Delmar was founded in October 1859 taking into account the clarification of the Delaware Railroad to the southern boundary of Delaware. The Transpeninsular Line was held responsible for the founding of this unique bi-state town because the Charter of the Delaware Railroad Company allowable only the building of a railroad within the State of Delaware and the charter of the corresponding railroad company in Maryland permissible only the laying of railroad track within the State of Maryland. Thus, in 1859, the two respective railroads met and the town of Delmar was born. The state is a portmanteau of the states whose attach this railroad middle straddles – Delaware and Maryland.

The Town of Delmar grew slowly until 1884 similar to the New York, Philadelphia and Norfolk Railroad (in 1921 acquired by the Pennsylvania Railroad) completed a railroad from Pocomoke City, Maryland to Cape Charles, Virginia and also standard a ferry abet across the Chesapeake Bay between Cape Charles and Norfolk, Virginia. These supplementary developments brusquely made the Delmarva Peninsula an important colleague between the north and south. The Town of Delmar, being the midway town of the Delmarva Peninsula and already a railroad terminal, was the reduction for trains to bend crews and locomotives and with a middle for keep of the rolling equipment. As a repercussion of these developments, a tremendous influx of experienced railroad men moved into the community and considerable other employment was furnished for local townspeople. During this accelerated rushed growth period, Delmar became a “boom town”. New dwelling units sprang up everything over town and additional businesses were traditional to meet the demands of its growing population. By 1889, the population of the Town of Delmar had increased to 680 and was still growing.

In 1888, the Town of Delmar, Maryland was decided a charter by the General Assembly of Maryland. An investigation of this charter and the laws of Maryland fails to tone any suggestion of the twin town of Delmar, Delaware. Therefore, it could be assumed that up until this era there was very little cooperation along with halves of the Town of Delmar. The Town of Delmar was something like entirely destroyed by ember in 1892 and anew in 1901. The first flame destroyed anything in its path beyond a ten-acre (40,000 m²) area and the second major flame was more or less as destructive. In each instance, the Town of Delmar was rebuilt and continued as a wealthy town. The first indication of any cooperation in the midst of Delmar, Maryland and Delmar, Delaware came in 1924 following surveys were conducted for a attainable sewerage system for every one town of Delmar. The construction of the sewerage system in 1927 was considered the first joint project between the two towns in that the produce an effect provided that both towns would maintain the outfall sewer afterward Maryland paying the expenses and billing the Delaware side one-half of everything costs.