Nogales is a city in, and the county seat of, Santa Cruz County, Arizona. The population is at 19,685 based on the projections of the latest US Census estimates (released May 2024). Nogales forms Arizona's largest transborder agglomeration with its adjacent twin city Nogales, Sonora, across the Mexican border. Nogales is home to four international ports of entry, including the Morley Port of Entry, Dennis Deconcini Port of Entry, Union Pacific rail, Nogales International Airport, and the Mariposa Port of Entry. Due to its location on the border and its major ports of entry, Nogales is Arizona's gateway for international trade. With more than $26 billion of trade into Arizona and the United States in fresh produce and manufactured goods from Mexico and the world. This trade helps to support tens of thousands of jobs and the overall economies in Ambos Nogales and throughout the state of Arizona. Nogales also is the beginning of the Arizona Sun Corridor, an economically important trade region stretching from Nogales to Prescott, including the Tucson and Phoenix metropolitan areas. The City of Nogales is truly the “Gateway to Arizona”!