The Key Tower is a skyscraper on Public Square in downtown Cleveland, Ohio designed by architect César Pelli. It is the tallest building in both the city of Cleveland and the state of Ohio, the 18th tallest building in the United States, and the 70th tallest building in the world. The building reaches 57 stories or 948 feet (289 m) to the top of its spire, and it can be visible for up to twenty miles (32 km) away. The tower contains about 1.5 million square feet (139,355 m²) of office space.

The tower, developed by the R.E. Jacobs Group, was originally built as the Society Center, and was renamed when KeyCorp acquired Society Bank. The tower faces two of downtown Cleveland's most significant public spaces, Public Square and Mall A.

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