Ontario Mills is a shopping and outlet mall located in Ontario, California, within the Los Angeles metropolitan area. With 28 million annual visitors, it is one of the top shopping and tourist destinations in California. It is one of three Mills landmarks in California that are now managed by Simon Property Group since April 2007. Simon owns 50% of it. The Outlets at Orange and The Great Mall are the others. Ontario Mills was designed by the architectural firm, F+A Architects.