Ciudad Juárez (Spanish pronunciation: [sjuˈðad ˈxwaɾes]), formerly known as Paso del Norte, is a city and seat of the municipality of Juárez in the Mexican state of Chihuahua. Juárez's estimated population is 1.3 million people. The city lies on the Rio Grande (Río Bravo del Norte), south of El Paso, Texas. El Paso and Ciudad Juárez comprise the second largest bi-national metropolitan area on the Mexico - United States border with a combined population of 2.1 million people.