The Chicago Water Tower is a contributing property in the Old Chicago Water Tower District landmark district. It is located at 806 North Michigan Avenue along the Magnificent Mile shopping district in the Near North Side community area of Chicago, Illinois. Located adjacent to Loyola University Chicago's downtown campus, the Water Tower serves as one of the Chicago Office of Tourism's Official Visitor's Centers. The Chicago Water Tower is the second-oldest water tower in the world, after the Louisville Water Tower in Louisville, Kentucky.

The tower, built in 1869 by architect William W. Boyington from yellowing Joliet limestone, is 154 feet (47 m) tall. Inside was a 138 foot (42 m) high standpipe to hold water. In addition to being used for firefighting, the pressure in the pipe could be regulated to control water surges in the area.

The tower gained prominence after the Great Chicago Fire of 1871. While some incorrectly believe that the tower was the only building to survive the fire, a few other buildings in the burned district survived along with the tower. But the water tower was the only public building in the burned zone to survive, and is the only one of the surviving structures still standing. In the years since the fire, the tower has become a symbol of old Chicago and of the city's recovery from the fire.