ATL may refer to:
Atlanta is the capital of and the most populous city in the U.S. state of Georgia, with an estimated 2015 population of 463,878. Atlanta is the cultural and economic center of the Atlanta metropolitan area, home to 5,710,795 people and the ninth largest metropolitan area in the United States.
The Atlantic Ocean is the second largest of the world's oceans with a total area of about 106,460,000 square kilometres (41,100,000 sq mi).
Club Atlético de Madrid, SAD (Spanish pronunciation: [ˈkluβ aðˈletiko ðe maˈðɾið]) commonly known as Atlético Madrid, or simply as Atlético, is a Spanish professional football club based in Madrid, that plays in La Liga.
Atlas Shrugged is a 1957 novel by Ayn Rand. Rand's fourth and last novel, it was also her longest, and the one she considered to be her magnum opus in the realm of fiction writing.
The Atlantic slave trade or transatlantic slave trade took place across the Atlantic Ocean from the 15th through the 19th centuries.
Atlantis (Ancient Greek: Ἀτλαντὶς νῆσος, "island of Atlas") is a fictional island mentioned within an allegory on the hubris of nations in Plato's works Timaeus and Critias, where it represents the antagonist naval power that besieges "Ancient Athens", the pseudo-historic embodiment of Plato's ideal state (see The Republic).
Atlantic City is a resort city in Atlantic County, New Jersey, United States, known for its casinos, boardwalk and beach.
The Atlanta Braves are an American professional baseball franchise based in the Atlanta metropolitan area.
Metro Atlanta, designated by the United States Office of Management and Budget as the Atlanta-Sandy Springs-Roswell, GA Metropolitan Statistical Area, is the most populous metro area in the US state of Georgia and the ninth-largest metropolitan statistical area (MSA) in the United States.