Katy Mills is an outlet shopping mall in Katy, Texas (USA) within the Houston–Sugar Land–Baytown metropolitan area, developed by The Mills Corporation and now owned by Simon Property Group. The mall opened on October 28, 1999 and hosts a variety of over 200 specialty stores. Katy Mills has about 1.3 million square feet (0.12 km²) of retail space.
Katy Mills is a one story facility that sits on 1.3 square miles (3.4 km2) of land. The mall is built with a "racetrack" design and one complete pass around the mall is approximately one mile.