Katy Mills is a shopping mall in Katy, Texas within the Houston metropolitan area, and it is one of the tourist destinations in Houston. It was developed by The Mills Corporation and is now managed by Simon Property Group, who owns 62.5% of it. The mall opened on October 28, 1999 and hosted a variety of over 200 specialty stores. Katy Mills has about 1.3 million square feet (0.12 km2) of retail space.