The Astor Street District is a historic district in Central Chicago, Illinois. Constructed over a period of more than 100 years, the buildings along Astor Street reflect the fashionable styles favored by their original high-society residents. The numerous 19th-century houses are designed in a variety of historical revival styles, and are interspersed with apartment buildings and townhouses. It was designated a Chicago Landmark on December 19, 1975.