Gilbert, Arizona

Gilbert is a town in Maricopa County, Arizona, southeast of Phoenix, and is regarded as a suburb of that city. It had a population of 287,285 in 2025, the fourth largest municipality in Arizona, and it is the most populous incorporated town in the United States, which is why it has been called the largest town in America. William Gilbert gave land to the Arizona Eastern Railway in 1902 for a rail line between Phoenix and Florence, and the place took his name. The first store opened in 1910 and the first post office in 1912, the same year that Mormon families who had left the colonies in Mexico settled there. Gilbert was incorporated on July 6, 1920 and was once known as the Hay Shipping Capital of the World.