Gilbert is a town in Maricopa County, Arizona, United States, located southeast of Phoenix, within the Phoenix metropolitan area. Once known as the "Hay Shipping Capital of the World", Gilbert is currently the most populous incorporated town in the United States. nown for being one of the best places to live in America, Gilbert boasts sunny weather, safe neighborhoods and an exceptional school system, as well as a wide array of outdoor and cultural attractions. Gilbert has over 10 million square feet of retail, including SanTan Village, an outdoor destination with top shopping and dining and the Heritage District, the downtown experience with local restaurants, unique shops, and cultural attractions.