Reportedly haunted locations in Washington, D.C.

Being the site of military battles, deadly duels, assassinations, untimely deaths, and other associated tragedies, there are a number of reportedly haunted locations in Washington, D.C., the capital city of the United States.

Washington's haunted history is so well known that some of its haunted locations were featured in a 2006 documentary, America's Haunted Houses, on the A&E cable network. Novelist Dan Brown mentioned them prominently in his 2009 novel, The Lost Symbol. Notable purportedly haunted locations include the United States Capitol, Capitol Hill, the White House, Lafayette Square and nearby buildings, Independence Avenue SW, The Octagon House, Chinatown, the National Theatre, Hay–Adams Hotel, Woodrow Wilson House, Omni Shoreham Hotel, and many others.

The U.S. Capitol is reputedly haunted by many past representatives and government officials, officers who served during the American Revolutionary War, workers who died during its construction and a "demon black cat" that is said to make appearances just before national tragedies or changes in presidential administration. Apparitions of deceased presidents have been reported in the White House, the most famous of which is Abraham Lincoln's ghost, reported by first lady Grace Coolidge, president Harry S. Truman, and British prime minister Winston Churchill, and apparitions of presidents Thomas Jefferson, Andrew Jackson, and John Tyler have all been witnessed, as have the spirits of many First Ladies.

The President's Park, Lafayette Park, and nearby buildings are reported to be home to ghosts such as Philip Barton Key II and Stephen Decatur who died there following pistol duels. The Octagon is supposedly one of the most haunted buildings in D.C., with sightings of its past occupants and African American slaves who once worked there. The National Theatre is said to be haunted by the ghost of actor John McCullough, who was murdered in the 1880s by a fellow thespian. Hay–Adams Hotel is claimed to be host to the ghost of Marian "Clover" Hooper Adams, the wife of Henry Brooks Adams, the celebrated 19th-century American journalist, historian and novelist, who was the grandson of John Quincy Adams, and the Woodrow Wilson House is allegedly haunted by former president Woodrow Wilson himself who spent his final years in illness there before dying in his bedroom in 1924. Houses in the Georgetown area of the city are reported to be haunted by figures from colonial times, including slaves, merchants and children. Staff and guests of the Omni Shoreham Hotel have told of stories of faint voices, cold breezes, and doors slamming shut and opening and televisions and lights turning on and off of their own accord.