Mexico City’s massive urban population (over 20 million as of 2015) makes this city the largest metropolitan area in the Western hemisphere. In addition to its large size, the city also has a unique food system. Aside from North American supermarket franchises, the city’s diverse food system also includes a various historical food markets where traditional foods are sold alongside modern food choices. These local markets can include both formal and informal food retailers. In conjunction with these large food markets, the city also hosts informal food retailers, including street vendors and markets on wheels. Together, this system of food retailers demonstrates the distinctive food system supporting Mexico City.