- Nogales is a city located on the border of the United States and Mexico. It is divided by the international boundary between Arizona and Sonora, with the United States portion of the city known as Nogales, Arizona, and the Mexican portion known as Heroica Nogales. The city is named after the Spanish word for "black walnut trees."
- Nogales, Arizona, is a town in Santa Cruz County and serves as a major port of entry for goods and people traveling between the United States and Mexico. It is part of the Tucson-Nogales metropolitan area and has a population of approximately 20,000 people.
- Heroica Nogales, on the Mexican side, is located in the state of Sonora and is a larger city with a population of around 250,000 people. It is an important industrial and commercial center in northwest Mexico, known for its maquiladora industry and its role in cross-border trade.
- Both Nogales, Arizona, and Heroica Nogales, Sonora, have a strong cultural connection due to their close proximity, with shared traditions, festivities, and economic ties. The two cities also face challenges related to immigration and border security, but are important gateways for trade and tourism between the United States and Mexico.