The Maryland Inn is reportedly haunted by Revolutionary War and Union soldier spirits, with guests experiencing phenomena such as disembodied singing, cold spots, unexplained noises, and shadowy figures. One specific ghost, Captain Campbell, has been seen in a naval uniform, and a ghostly presence has been felt on the fourth floor of the building. Guests have heard disembodied singing, which is attributed to a group of drunken Union Soldiers from the Civil War. The spirit of Captain Campbell, wearing a naval uniform, has been seen in the basement taproom. Other reports include shadowy figures in Revolutionary War-era and 19th-century clothing. Guests and visitors have reported unexplained noises and the scent of tobacco smoke in empty rooms. Some guests experience a chilling, cold presence on the fourth floor of the inn. Items have been observed to move out of place.